期刊文献+
共找到619篇文章
< 1 2 31 >
每页显示 20 50 100
Electrochemical Degradation of Indigocarmine Dye at Ni/Graphite Modified Electrode in Aqueous Solution
1
作者 Kodenakoppalu Mahadevappa Chaithra Hiremarali Sathyanarayana Sindhushree Bellale Marigowda Venkatesha 《Modern Research in Catalysis》 2024年第3期39-54,共16页
Nickel Graphite modified electrode (Ni/GME) was prepared by electrochemical method and degradation of Indigocarmine (IC) dye was carried out. An investigation between the efficiency of degradation by graphite electrod... Nickel Graphite modified electrode (Ni/GME) was prepared by electrochemical method and degradation of Indigocarmine (IC) dye was carried out. An investigation between the efficiency of degradation by graphite electrode and the Ni/graphite modified electrode has been carried out. The different effects of concentration, current density and temperature on the rate of degradation were studied. This study shows that the rate of the degradation is more for Ni doped modified graphite electrode. UV-Visible spectra before and after degradation of the dye solution were observed. The thin film formation of Ni or encapsulated in graphite rod is observed by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM & EDAX). The instantaneous current effectiveness values of different experimental conditions are evaluated. The anodic oxidation by Ni/ graphite modified electrode showed the complete degradation of aqueous solution indigocarmine, which is confirmed by UV-Visible and chemical oxygen demand (COD) measurements. The dye is converted into CO2, H2O and simpler inorganic salts. The results observed for reuse of modified electrodes indicate that the Ni/graphite modified electrode would be a promising anode for electrochemical degradation of indigocarmine. This method can be applied for the remediation of waste water containing organics, cost-effective and simple. 展开更多
关键词 Indigocarmine (IC) Dye nickel Graphite Modified electrode (Ni/GME) Chemical Oxygen Demand (COD) Instantaneous Current Efficiency (ICE)
下载PDF
Kinetics and Mechanism of Hypophosphite Electrooxidation on a Nickel Electrode 被引量:1
2
作者 曾跃 郑仰存 +3 位作者 易建龙 于尚慈 杨春明 李则林 《物理化学学报》 SCIE CAS CSCD 北大核心 2003年第8期718-722,共5页
用电化学质谱(EMS)和动力学模型分析等方法研究了次亚磷酸根在镍电极上的电化学氧化机理和动力学.研究表明,次亚磷酸根的电化学氧化是通过从P-H键脱离一个原子H,形成磷中心自由基(PHO-●2),而磷中心自由基(PHO-●2)进一步进行电化学反... 用电化学质谱(EMS)和动力学模型分析等方法研究了次亚磷酸根在镍电极上的电化学氧化机理和动力学.研究表明,次亚磷酸根的电化学氧化是通过从P-H键脱离一个原子H,形成磷中心自由基(PHO-●2),而磷中心自由基(PHO-●2)进一步进行电化学反应形成最终产物亚磷酸。利用该模型,推导出相关动力学方程并通过与实验数据拟合获得动力学参数.结果表明,该模型能很好地模拟次亚磷酸根在镍电极上的电化学氧化过程. 展开更多
关键词 次亚磷酸根 镍电极 电氧化机理 动力学 电化学
下载PDF
Effects of flaky rare earth oxide additives on the high temperature performance of nickel electrodes 被引量:3
3
作者 方庆 成艳 +4 位作者 简旭宇 朱磊 蔚海军 王忠 蒋利军 《Journal of Rare Earths》 SCIE EI CAS CSCD 2010年第1期72-78,共7页
Effects of flaky rare earth oxide additives including Er2O3,Tm2O3,and Yb2O3,Lu2O3 on high temperature and high rate discharge performance of nickel electrodes were investigated.The discharge efficiency at 0.2C reached... Effects of flaky rare earth oxide additives including Er2O3,Tm2O3,and Yb2O3,Lu2O3 on high temperature and high rate discharge performance of nickel electrodes were investigated.The discharge efficiency at 0.2C reached 96% at 60 oC for electrodes with 1 at.% flaky rare earth oxides.The high rate discharge performance for electrodes with flaky rare earth oxides were improved significantly,for example,discharge efficiency at 5C improved from 50% to 70%.The results showed that the end charging potential of the ... 展开更多
关键词 flaky rare earth oxides high temperature performance cyclic voltammograms nickel electrodes nickel-metal hydride batteries rare earths
下载PDF
Electrocatalytic Oxidation of H_2 O_ 2 at a Carbon Paste Electrode Modified with a Nickel (Ⅱ)-5,11,17,23-Tetra-Tert-Butyl-25,27-Bis(Diethylcarbamoylmethoxy)Calix[4] Arene Complex and Its Application 被引量:1
4
作者 Li Chun\|ya, Chen Yong, Wang Chang\|fa , Li Hai\|bing, Chen Yuan\|yin College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, Hubei, China 《Wuhan University Journal of Natural Sciences》 CAS 2003年第03A期857-860,共4页
Electrochemical behavior of a carbon paste electrode (CPE) modified with nickel(II)\|5, 11, 17, 23\|tetra\|tert\|butyl\|25, 27\|bis(diethylcarbamoylmethoxy)calix\arene (Ni(Ⅱ)\|L) complex and its electrocatalytic acti... Electrochemical behavior of a carbon paste electrode (CPE) modified with nickel(II)\|5, 11, 17, 23\|tetra\|tert\|butyl\|25, 27\|bis(diethylcarbamoylmethoxy)calix\arene (Ni(Ⅱ)\|L) complex and its electrocatalytic activity towards the oxidation of hydrogen peroxide were investigated by cyclic voltammetric technique in a 5.0×10 -2 mol/L NaClO 4+ 1.0×10 -3 mol/L NaOH solution. It was found that Ni(II)\|L acts as an effective catalyst for the oxidation of hydrogen peroxide. The modified electrode exhibited a linear response over a hydrogen peroxide concentrations in the range of 2.0×10 -6 \|1.0×10 -4 mol/L with a detection limit as low as 1.0×10 -6 mol/L. The relative standard deviation was 3.5% for 5 successive determinations of H 2 O 2 at 1.0×10 -5 mol/L. The modified electrode was used successfully in rainwater analysis. 展开更多
关键词 nickel CALIXARENE carbon paste electrode electrocatalysis hydrogen peroxide
下载PDF
Influence of TiO_2 on the electrochemical performance of pasted typeβ-nickel hydroxide electrode in alkaline electrolyte 被引量:3
5
作者 B.Shruthi B.J.Madhu V.Bheema Raju 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第1期41-48,共8页
Nickel hydroxide was used as the positive electrode material in rechargeable alkaline batteries, which plays a significant role in the field of electric energy storage devices. β-nickel hydroxide(β-Ni(OH)2 ) was... Nickel hydroxide was used as the positive electrode material in rechargeable alkaline batteries, which plays a significant role in the field of electric energy storage devices. β-nickel hydroxide(β-Ni(OH)2 ) was prepared from nickel sulphate solution using potassium hydroxide as a precipitating agent. Pure β-phase of nickel hydroxide was confirmed from XRD and FT-IR studies. The effects of TiO2 additive on the β-Ni(OH)2 electrode performance are examined. The structure and property of the TiO2 added β-Ni(OH)2 were characterized by XRD, TG-DTA and SEM analysis. A pasted–type electrode is prepared using nickel hydroxide powder as the main active material on a nickel sheet as a current collector. Cyclic voltammetry and electrochemical impedance spectroscopy studies were performed to evaluate the electrochemical performance of the β-Ni(OH)2 and TiO2 added β-Ni(OH)2 electrodes in 6 M KOH electrolyte. Anodic(Epa) and cathodic(Epc)peak potentials are found to decrease after the addition of TiO 2 into β-Ni(OH)2 electrode material. Further,addition of TiO2 is found to enhance the reversibility of the electrode reaction and also increase the separation of the oxidation current peak of the active material from the oxygen evolution current. Compared with pure β-Ni(OH)2 lectrode,TiO2 added β-Ni(OH)2 electrode is found to exhibit higher proton diffusion coefficient(D) and lower charge transfer resistance. These findings suggest that the TiO2 added β-Ni(OH)2 electrode possess improved electrochemical properties and thus can be recognized as a promising candidate for the battery electrode applications. 展开更多
关键词 nickel hydroxide electrode material Thermogravimetric analysis Electrochemical properties Impedance spectroscopy
下载PDF
Selective Heating of Transition Metal Usings Hydrogen Plasma and Its Application to Formation of Nickel Silicide Electrodes for Silicon Ultralarge-Scale Integration Devices 被引量:4
6
作者 Tetsuji Arai Hiroki Nakaie +8 位作者 Kazuki Kamimura Hiroyuki Nakamura Satoshi Ariizumi Satoki Ashizawa Keisuke Arimoto Junji Yamanaka Tetsuya Sato Kiyokazu Nakagawa Toshiyuki Takamatsu 《Journal of Materials Science and Chemical Engineering》 2016年第1期29-33,共5页
We developed an apparatus for producing high-density hydrogen plasma. The atomic hydrogen density was 3.1 × 1021 m<sup>?3</sup> at a pressure of 30 Pa, a microwave power of 1000 W, and a hydrogen gas ... We developed an apparatus for producing high-density hydrogen plasma. The atomic hydrogen density was 3.1 × 1021 m<sup>?3</sup> at a pressure of 30 Pa, a microwave power of 1000 W, and a hydrogen gas flow rate of 10 sccm. We confirmed that the temperatures of transition-metal films increased to above 800<sup>。</sup>C within 5 s when they were exposed to hydrogen plasma formed using the apparatus. We applied this phenomenon to the selective heat treatment of nickel films deposited on silicon wafers and formed nickel silicide electrodes. We found that this heat phenomenon automatically stopped after the nickel slicidation reaction finished. To utilize this method, we can perform the nickel silicidation process without heating the other areas such as channel regions and improve the reliability of silicon ultralarge-scale integration devices. 展开更多
关键词 Selective Heating nickel Silicide electrode Hydrogen Plasma Microwave Plasma
下载PDF
Recent advances in cobalt-, nickel-, and iron-based chalcogen compounds as counter electrodes in dye-sensitized solar cells 被引量:1
7
作者 Pengwei Wei Xue Chen +6 位作者 Guizhu Wu Jing Li Yang Yang Zeiwei Hao Xiao Zhang Jing Li Lu Liu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第9期1282-1297,共16页
The electroactive materials used in the counter electrode(CE)are of great concern as they influence the photovoltaic performances of dye-sensitized solar cells.The main functions of CE materials are collecting electro... The electroactive materials used in the counter electrode(CE)are of great concern as they influence the photovoltaic performances of dye-sensitized solar cells.The main functions of CE materials are collecting electrons from the external circuit and transferring them to the electrolyte and realizing the catalytic reduction of the redox species(I3^– or Co^3+)present in the electrolyte.The research hotspot of CE materials is seeking functional materials that display high efficiency,low cost,and good electrochemical stability and can substitute the benchmark platinum electrode.Chalcogen compounds of cobalt,nickel,and iron have been widely applied as CE materials and exhibit excellent electrocatalytic performances owing to their unique electrical properties,similar energies of adsorption of I atoms as platinum,excellent catalytic activities,and good chemical stabilities.In this review,we trace the developments and performances of chalcogen compounds of iron,cobalt,and nickel as CE materials and present the latest research directions for improving the electrocatalytic performances.We then highlight the optimization strategies for further improving their performances,such as fabrication of architectures,regulation of the components,synthesis of composites containing carbon materials,and elemental doping. 展开更多
关键词 Counter electrode Dye-sensitized solar cell Chalcogen compound COBALT nickel Iron
下载PDF
Plastic supported platinum modified nickel electrode and its high electrocatalytic activity for sodium borohydride electrooxidation 被引量:1
8
作者 Bin Wang Dongming Zhang +4 位作者 Ke Ye Kui Cheng Dianxue Cao Guiling Wang Xiaoli Cheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2015年第4期497-502,共6页
A novel plastic/multi-walled carbon nanotube(MWNTs)-nickel(Ni)-platinum(Pt) electrode(PMNP) is prepared by chemical-reducing Pt onto the surface of Ni film covered plastic/MWNTs(PM) substrate. The MWNTs are ... A novel plastic/multi-walled carbon nanotube(MWNTs)-nickel(Ni)-platinum(Pt) electrode(PMNP) is prepared by chemical-reducing Pt onto the surface of Ni film covered plastic/MWNTs(PM) substrate. The MWNTs are adhered by a piece of commercial double faced adhesive tape on the surface of plastic paper and the Ni film is prepared by a simple electrodeposition method. The morphology and phase structure of the PMNP electrode are characterized by scanning electron microscopy,transmission electron microscope and X-ray diffractometer. The catalytic activity of the PMNP electrode for Na BH4 electrooxidation is investigated by means of cyclic voltammetry and chronoamperometry. The catalyst combines tightly with the plastic paper and exhibits a good stability. MWNTs serve as both conductive material and hydrogen storage material and the Ni film and Pt are employed as electrochemical catalysts. The PMNP electrode exhibits a high electrocatalytic performance and the oxidation current density reaches to 10.76 A/(mg·cm) in 0.1 mol/dm3 Na BH4at0 V,which is much higher than those in the previous reports. The using of waste plastic reduces the discarding of white pollution and consumption of metal resources. 展开更多
关键词 Plastic Platinum modified nickel electrode Chemical-reducing High electrocatalytic performance Reduce white pollution
下载PDF
Synergistic effect of cobalt and copper on a nickel-based modified graphite electrode during methanol electro-oxidation in NaOH solution 被引量:1
9
作者 Tayebe Rostami Majid Jafarian +2 位作者 Somaieh Miandari Mohammad G.Mahjani Fereydoon Gobal 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2015年第11期1867-1874,共8页
The electrocatalytic oxidation of methanol was studied over Ni, Co and Cu binary or ternary alloys on graphite electrodes in a NaOH solution (0.1 mol/L). The catalysts were prepared by cycling the graphite electrode... The electrocatalytic oxidation of methanol was studied over Ni, Co and Cu binary or ternary alloys on graphite electrodes in a NaOH solution (0.1 mol/L). The catalysts were prepared by cycling the graphite electrode in solutions containing Ni, Cu and Co ions at cathodic potentials. The synergistic effects and catalytic activity of the modified electrodes were investigated by cyclic voltammetry (CV), chronoamperometry CCA) and electrochemical impedance spectroscopy (EIS). It was found that, in the presence of methanol, the modified Ni-based ternary alloy electrode (G/NiCuCo) exhibited a significantly higher response for methanol oxidation compared to the other samples. The anodic peak currents showed a linear dependency on the square root of the scan rate, which is a characteristic of a diffusion controlled process. During CA studies, the reaction exhibited Cottrellin behavior and the diffusion coefficient of methanol was determined to be 6.25× 10-6 cm2/s and the catalytic rate constant, K, for methanol oxidation was found to be 40×107 cm3/Cmol.s). EIS was used to investigate the catalytic oxidation of methanol on the surface of the modified electrode. 展开更多
关键词 Methanol electro-oxidation Electrocatalysis Synergistic effect nickel Modified electrode
下载PDF
EFFECT OF ELECTROLESS PLATING COBALT UPON CHARACTERISTICS OF NICKEL HYDROXIDE ELECTRODEFORRECHARGEABLEALKALINEBATTERIES
10
作者 Wang, XY Zhang, YS +2 位作者 Yan, J Yuan, HT Song, DY 《中国有色金属学会会刊:英文版》 CSCD 1998年第4期135-141,共7页
INTRODUCTIONNickelhydroxideelectrodeshavebeenwidelyusedaspositiveelectrodeinNiCd,NiH2andNiMHsecondarybat... INTRODUCTIONNickelhydroxideelectrodeshavebeenwidelyusedaspositiveelectrodeinNiCd,NiH2andNiMHsecondarybateries.Improvement... 展开更多
关键词 nickel HYDROXIDE electrode ELECTROLESS PLATING COBALT electrode performance electrochemical impedance conductivity
下载PDF
Kinetic Model of Hypophosphite Oxidation on a Nickel Electrode in D_2O Solution
11
作者 Yue ZENG Hui Xian WANG +2 位作者 Shang Ci YU Xin De WU Xue Qiang CAO 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第7期641-644,共4页
Kinetic model of hypophosphite oxidation on a nickel electrode was studied in D2O solution in order to reach a better understanding of the oxidation mechanism. In the model;he electrooxidation of hypophosphite undergo... Kinetic model of hypophosphite oxidation on a nickel electrode was studied in D2O solution in order to reach a better understanding of the oxidation mechanism. In the model;he electrooxidation of hypophosphite undergo a H abstraction of hypophosphite from the P-H bond to form the phosphorus-centered radical (PWO2-)-P-., which subsequently is electrochemically reacted with water to form the final product, phosphite. The kinetic equations were derived, and the kinetic parameters were obtained from a comparison of experimental results and the kinetic equations. The process of hypophosphite electrooxidation could be well simulated by this model. 展开更多
关键词 Kinetic model hypophosphite oxidation MECHANISM nickel electrode
下载PDF
Voltammetric Response and Electrocatalysis of Glassy Carbon Electrode Modified with Monolayer Nickel Hydroxide
12
作者 Liu Shouqing Li Huiling +1 位作者 Jiang Mian Li Peibiao 《Wuhan University Journal of Natural Sciences》 CAS 1997年第1期90-94,共5页
The glassy carbon (GC) electrode modified with a monolayer nickel hydroxide (GC/Ni(OH) 2) was prepared by immersion of GC substrate in 1.0×10 -3 mol/L NiSO 4 solution, and then cyclic voltammetric scannin... The glassy carbon (GC) electrode modified with a monolayer nickel hydroxide (GC/Ni(OH) 2) was prepared by immersion of GC substrate in 1.0×10 -3 mol/L NiSO 4 solution, and then cyclic voltammetric scanning in 0.20 mol/L KOH. Similarly, GC/Co(OH) 2 electrode was prepared too. The experiments showed that the voltammetric behavior of GC/Ni(OH) 2 electrode in 0.20 mol/L KOH is more stable than that of GC/ Co(OH) 2. It was found that the GC/Ni(OH) 2 electrode acts as an effective electrocatalysis for the oxidation of hydrazine. 展开更多
关键词 glassy carbon modified electrode MONOLAYER nickel hydroxide cobalt hydroxide electroctalysis HYDRAZINE
下载PDF
ELECTRO-OXIDATION OF ETHANOL ON HIGHLY PREFERRED ORIENTATION NICKEL ELECTRODE IN NaOH
13
作者 Ling HUANG Shu Kai XU Shao Min ZHOU(Department of Chemistry, Xiamen University, Xiamen,36100) 《Chinese Chemical Letters》 SCIE CAS CSCD 1996年第8期745-748,共4页
The electro-oxidation of ethanol on a highly preferred orientation (220) Ni electrode and alower texture degree Ni electrode in 1 mol/L NaoH was investigated with cyclicvoltammetry. The mechanism of ethanol oxidation ... The electro-oxidation of ethanol on a highly preferred orientation (220) Ni electrode and alower texture degree Ni electrode in 1 mol/L NaoH was investigated with cyclicvoltammetry. The mechanism of ethanol oxidation on the highly preferred orientation Nielectrode is proposed. It is shown that the current peak of electro-oxidation of ethanol onthe highly preferred orientation (220) Ni electrode is much higher than that of the lowertextUre degree (220) Ni electrode, Ni(Ⅲ) on the surface of the highly preferredorientation(220)Ni electrode is responsible for the oxidation ethanol. 展开更多
关键词 NAOH nickel ORIENTATION PREFERRED ELECTRO electrode
下载PDF
Valence modulated nickel oxynitride network as integrated bifunctional electrodes for enhanced energy storage
14
作者 Shouzhi Wang Hengshuai Li +4 位作者 Weidong He Hehe Jiang Yongliang Shao Yongzhong Wu Xiaopeng Hao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第5期56-63,共8页
As promising electrode materials,transition metal oxides have attracted considerable attention owing to their excellent performance in electrochemical energy storage.However,their poor conductivity and fragile structu... As promising electrode materials,transition metal oxides have attracted considerable attention owing to their excellent performance in electrochemical energy storage.However,their poor conductivity and fragile structure limit their practical application.In this study,a binder-free nickel oxide/oxynitride network(NiON WS)bifunctional electrodes with cation multivalent states that exhibit high energy storage performance were synthesized for the first time.The massive active sites,high specific surface areas,and multiple cation valence states of NiON WS were advantageous for electrochemical redox reaction during its application in supercapacitors(1283.5 mF cm^(-2))and lithium-ion batteries(1345.0 mA h g^(-1)).Particularly,the NiON WS based flexible asymmetric SCs exhibit excellent capacitance and energy densities.First-principle calculations were employed to study the mechanism of the electrochemical performance improvement of NiON WS.This study demonstrates the potential of transition metal oxides electrode with high capacity and activity for electrochemical energy storage and conversion. 展开更多
关键词 nickel oxynitride Bifunctional electrodes Flexible supercapacitors Lithium-ion battery First-principle calculation
下载PDF
Electroless Co-Zn Surface-Modified Nickel Hydroxide as an Active Material for Pasted Nickel Electrodes
15
作者 宋全生 唐致远 +1 位作者 郭鹤桐 CHAN S LI 《Transactions of Tianjin University》 EI CAS 2004年第1期47-53,共7页
Chemically precipitated β type nickel hydroxide powder was surface modified by electroless deposition of Co Zn coatings,and physical properties of both the modified and unmodified nickel hydroxide were characterized ... Chemically precipitated β type nickel hydroxide powder was surface modified by electroless deposition of Co Zn coatings,and physical properties of both the modified and unmodified nickel hydroxide were characterized by scanning electron microscopy (SEM), specific surface area (BET), X ray diffraction (XRD) and X ray photoelectron spectroscopy (XPS). It has been found that Co and Zn components of the surface electroless coatings exist in the oxidized state. Electrochemical performances of pasted nickel electrodes using the modified nickel hydroxide as an active material were investigated, and compared with those of the electrodes prepared with the unmodified nickel hydroxide. Charge/discharge tests show that the modified nickel hydroxide electrodes exhibit better performances in the charge efficiency, specific discharge capacity and active material utilization. Their resistance to swelling with cycling is also superior to that of the unmodified nickel hydroxide electrodes. Cyclic voltammetric (CV) studies indicate that the modified electrodes have a higher electrochemical activity, and the porous pasted nickel electrodes have some distinguished CV characteristics in comparison with those of the thin film nickel electrodes. 展开更多
关键词 nickel hydroxide surface modification electroless deposition of Co Zn pasted nickel electrodes electrochemical performances
下载PDF
A STUDY ON Ti ELECTRODE MODIFIED BY NICKEL ION BEANS
16
作者 Ji Shuang ZHANG Rong Hui WANG +1 位作者 Yao Jiao LU Han Ming FENG,Jin Quan YANG Department of Chemistry and Chemical Engineering,Hunan University Changsha,410082 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第3期251-252,共2页
The reduction of H^+ on Ti electrodes which were treated by implanting nickel ions and thermodiffusing in vacuum has been studied.The calytic activity of the afore- mentioned electroes for H^+ reduction is much higher... The reduction of H^+ on Ti electrodes which were treated by implanting nickel ions and thermodiffusing in vacuum has been studied.The calytic activity of the afore- mentioned electroes for H^+ reduction is much higher than that of the untreated Ti electrodes. 展开更多
关键词 TI A STUDY ON Ti electrode MODIFIED BY nickel ION BEANS ION
下载PDF
CoO AS ADDITIVE IN POSITIVE ELECTRODE OF NICKEL-METAL HYDRIDE BATTERY
17
作者 吴建波 涂江平 +3 位作者 韩泰安 周才明 张文魁 赵新兵 《化工学报》 EI CAS CSCD 北大核心 2004年第S1期197-200,共4页
A series of positive electrodes for Ni/MH battery were fabricated by addition of CoO.The morphology and microstructure of the electrodes were examined by SEM and EDS, and electrochemical behavior was investigated in t... A series of positive electrodes for Ni/MH battery were fabricated by addition of CoO.The morphology and microstructure of the electrodes were examined by SEM and EDS, and electrochemical behavior was investigated in three-compartment appliances at room temperature.The electrochemical performance of the positive electrodes with CoO was improved. Under the same charge-discharge cycle, the electrodes with CoO showed higher specific capacity, lower charge mean voltage and higher discharge mean voltage. But ... 展开更多
关键词 nickel-metal HYDRIDE battery POSITIVE electrode COO ADDITIVE
下载PDF
Surface behavior of pasted nickel electrodes with electrodeposited Co-Ce on substrate
18
作者 王殿龙 王春雨 +1 位作者 戴长松 姜兆华 《中国有色金属学会会刊:英文版》 EI CSCD 2006年第5期1148-1153,共6页
MH/Ni battery for electro-vehicle has become a hot topic of studies. The Co-Ce alloys were electrodeposited on the nickel substrate to modify pasted nickel electrode substrate. SEM and XRD results show that the surfac... MH/Ni battery for electro-vehicle has become a hot topic of studies. The Co-Ce alloys were electrodeposited on the nickel substrate to modify pasted nickel electrode substrate. SEM and XRD results show that the surface of the substrate contains Co(OH)2 and CoOOH film, and CV shows that modified film can improve electron conductivity capability. The state of charge (SOC) or state of discharge (SOD) curves indicate that Co-Ce modified substrate can enhance Ni electrode charge and discharge performance at high rate. The surface analysis by XPS shows that, the Co(Ⅱ)/Co(Ⅲ) ratio is 76.80/23.19 at the SOD, but the Co(Ⅱ)/Co(Ⅲ) ratio is 57.79/42.21 at the SOC, which indicates that the conductibility of electrodeposited Co-Ce alloys on the nickel substrate is enhanced because CoOOH and Co(OH)2 are created on the substrate surface. The modified surface with CoOOH and Co(OH)2 can enhance the conductibility of electrons between the substrate and active materials, and improve the high rate SOC and SOD ability. 展开更多
关键词 镍电极 Co-Ce合金 表面处理 MH/NI电池 XRD SEM
下载PDF
Research on nodular iron joint welded with nickel-iron electrode by the moire fringe method
19
作者 Zhou Zhenfeng Zhang Xiaoying +2 位作者 Guan Liyuan Zhou Gang Wu Shanli Jilin University of Technology,Changchun 《China Welding》 EI CAS 1992年第2期135-142,共8页
Nickel-iron type cast iron electrodes are widely used for welding QT600-3 nodular iron.Nevertheless,the research work has demonstrated that the strength of these heterogeneous welded joints is low.In this paper,the un... Nickel-iron type cast iron electrodes are widely used for welding QT600-3 nodular iron.Nevertheless,the research work has demonstrated that the strength of these heterogeneous welded joints is low.In this paper,the uni- axial tension of the joints is studied by the Moire fringe method,and the dis- placement,strain and stress in the total fields are obtaind.Based on the uneven distribution of strain and stress,the reason of crack initiation and propagation is discussed.Through examining the appearance of the fracture by scanning elec- tron microscope,a lot of spherical substances distributed on the fracture surface are found,which may be another reason leading to cracking of the welded joint under the lower tensile stress.These new findings will help to improve the properties of nickel-iron type cast iron electrodes and the strength of the welded joint. 展开更多
关键词 nickel-iron electrode nodular iron welded joint
下载PDF
An improved analysis method of constant-current charge/discharge curves and its application to nickel hydroxide electrode
20
作者 潘滔 王建明 +3 位作者 陈惠 赵彦琳 肖慧明 张鉴清 《中国有色金属学会会刊:英文版》 CSCD 2003年第2期462-466,共5页
The derivative of charge and discharge curves (d t /d E vs E plot) can be used to describe the charge and discharge process more exactly. The d t /d E ? 獷 plots of nickel hydroxide electrode at different charge/disch... The derivative of charge and discharge curves (d t /d E vs E plot) can be used to describe the charge and discharge process more exactly. The d t /d E ? 獷 plots of nickel hydroxide electrode at different charge/discharge rates and intermittent discharge experiment are discussed. Though the d t /d E ? 獷 plot is affected by many factors, it clearly has intrinsic relation with the nature of active material such as conductivity and thermodynamic potential of active material, which changes with the state of charge. The d t /d E—E plot can also be applied to other electrochemical active materials, especially to those having several phases during charge or discharge. 展开更多
关键词 镍氢电池 电极 分析方法 改进 放电曲线
下载PDF
上一页 1 2 31 下一页 到第
使用帮助 返回顶部