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PVDF-Based Micro Inorganic Fillers-Containing Polymer Electrolyte Membranes 被引量:2
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作者 白莹 吴锋 吴川 《Journal of Beijing Institute of Technology》 EI CAS 2006年第3期344-347,共4页
Polymer electrolyte membranes based on poly (vinylidene fluoride-co-hexafluoropropylene) (PVDFHFP) with and without different types of micro inorganic fillers were prepared by phase-inversion process. Morphologies... Polymer electrolyte membranes based on poly (vinylidene fluoride-co-hexafluoropropylene) (PVDFHFP) with and without different types of micro inorganic fillers were prepared by phase-inversion process. Morphologies, porosities and electrochemical properties 'of the as-prepared membranes were investigated by means of scanning electronic microscopy (SEM), PC (propylene carbonate) uptake and alternating current (AC) impedance technique. Compared with other membranes, the membrane with micro SiO2 filler shows a dense morphology so that its PC uptake is the highest, namely, 339 %. The membrane filled with micro TiO2 exhibits good electrochemical performances: the ion conductivity is as high as 1.1 × 10^-3 S/cm at 18 ℃, which can meet the demand of lithium ion batteries. Moreover, its initial charge-discharge efficiency exceeds 89 %. The composite membranes with micro SiO2, TiO2 and Al2O3 are more suitable for the utilization in lithium ion batteries due to better cycle.ability, whereas the battery assembled with the blank membrane containing no inorganic fillers encounters a short circuit after the 5th cycle. 展开更多
关键词 polymer electrolyte membranes micro inorganic fillers lithium ion batteries
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PHOTOINITIATED CROSSLINKING OF EPDM/INORGANIC FILLER BLENDS AND CHARACTERIZATION OF RELATED PROPERTIES 被引量:1
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作者 瞿保钧 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2010年第1期119-127,共9页
Photoinitiated crosslinking of ethylene-propylene-diene terpolymer (EPDM) blends filled with calcium carbonate, talc and calcined kaolin (CK) in the presence of benzil dimethyl ketal as photoinitiator and trimethy... Photoinitiated crosslinking of ethylene-propylene-diene terpolymer (EPDM) blends filled with calcium carbonate, talc and calcined kaolin (CK) in the presence of benzil dimethyl ketal as photoinitiator and trimethylolpropane triacrylate as crosslinker and their related properties have been studied by different analytical methods, The results from gel content and heat extension determination show that the efficiency ofphotocrosslinking of EPDM increases with increasing the content of diene and its molecular weight. The EPDM blends with 100 phr different inorganic fillers can be photocrosslinked to gel content of above 60% by 5 s UV-irradiation under optimum conditions. Under the same conditions of irradiation, the orders of photocrosslinking rate and final gel content are EPDM/CaCO3 〉 EPDM/talc 〉 EPDM/CK. The data from thermogravimetric analysis, dynamic mechanical thermal analysis, electrical properties, mechanical tests and scanning electron microscopy show that UV irradiation crosslinking apparently enhances the thermal stability, mechanical properties and electrical properties of the photocrosslinked EPDM/inorganic filler samples. Although the attenuated total-reflection FTIR data show that inorganic fillers can promote the surface photo-oxidation of EPDM/inorganic filler samples with increasing the irradiation time, the above related properties of the photocrosslinked EPDM blends irradiated within 5 s are enough to satisfy many applications in the cable industry. 展开更多
关键词 PHOTOCROSSLINKING Ethylene-propylene-diene terpolymer inorganic filler Benzil dimethyl ketal Trimethylolpropane triacrylate.
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Advancements and Challenges in Organic–Inorganic Composite Solid Electrolytes for All‑Solid‑State Lithium Batteries
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作者 Xueyan Zhang Shichao Cheng +4 位作者 Chuankai Fu Geping Yin Liguang Wang Yongmin Wu Hua Huo 《Nano-Micro Letters》 SCIE EI CAS 2025年第1期46-97,共52页
To address the limitations of contemporary lithium-ion batteries,particularly their low energy density and safety concerns,all-solid-state lithium batteries equipped with solid-state electrolytes have been identified ... To address the limitations of contemporary lithium-ion batteries,particularly their low energy density and safety concerns,all-solid-state lithium batteries equipped with solid-state electrolytes have been identified as an up-and-coming alternative.Among the various SEs,organic–inorganic composite solid electrolytes(OICSEs)that combine the advantages of both polymer and inorganic materials demonstrate promising potential for large-scale applications.However,OICSEs still face many challenges in practical applications,such as low ionic conductivity and poor interfacial stability,which severely limit their applications.This review provides a comprehensive overview of recent research advancements in OICSEs.Specifically,the influence of inorganic fillers on the main functional parameters of OICSEs,including ionic conductivity,Li+transfer number,mechanical strength,electrochemical stability,electronic conductivity,and thermal stability are systematically discussed.The lithium-ion conduction mechanism of OICSE is thoroughly analyzed and concluded from the microscopic perspective.Besides,the classic inorganic filler types,including both inert and active fillers,are categorized with special emphasis on the relationship between inorganic filler structure design and the electrochemical performance of OICSEs.Finally,the advanced characterization techniques relevant to OICSEs are summarized,and the challenges and perspectives on the future development of OICSEs are also highlighted for constructing superior ASSLBs. 展开更多
关键词 Composite solid electrolytes inorganic filler Interfacial stability Li-ion conduction mechanism Characterization techniques
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Recent developments in high-performance Nafion membranes for hydrogen fuel cells applications 被引量:1
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作者 Li-Yu Zhu Yu-Cheng Li +3 位作者 Jing Liu Jing He Lu-Ying Wang Jian-Du Lei 《Petroleum Science》 SCIE CAS CSCD 2022年第3期1371-1381,共11页
As a promising alternative to petroleum fossil energy,polymer electrolyte membrane fuel cell has drawn considerable attention due to its low pollution emission,high energy density,portability,and long operation times.... As a promising alternative to petroleum fossil energy,polymer electrolyte membrane fuel cell has drawn considerable attention due to its low pollution emission,high energy density,portability,and long operation times.Proton exchange membrane(PEM)like Nafion plays an essential role as the core of fuel cell.A good PEM must have satisfactory performance such as high proton conductivity,excellent mechanical strength,electrochemical stability,and suitable for making membrane electrode assemblies(MEA).However,performance degradation and high permeability remain the main shortcomings of Nafion.Therefore,the development of a new PEM with better performance in some special conditions is greatly desired.In this review,we aim to summarize the latest achievements in improving the Nafion performance that works well under elevated temperature or methanol-fueled systems.The methods described in this article can be divided into some categories,utilizing hydrophilic inorganic material,metal-organic frameworks,nanocomposites,and ionic liquids.In addition,the mechanism of proton conduction in Nafion membranes is discussed.These composite membranes exhibit some desirable characteristics,but the development is still at an early stage.In the future,revolutionary approaches are needed to accelerate the application of fuel cells and promote the renewal of energy structure. 展开更多
关键词 Fossil energy Fuel cell Proton exchange membrane Proton conductivity inorganic fillers
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Preparation and properties of silane coupling agent modified steel slag as functional filler for anti-corrosion coating 被引量:1
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作者 Wei-cheng Zheng Wei-cheng Xu +6 位作者 Hao Zhang Hao-xuan Zheng Lin Wang Zheng-ming Cheng Yan-fei Ye Jun Lin Hong-ming Long 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第4期708-716,共9页
The chemical composition and high wear resistance of steel slag(SS)make it a potential alternative to traditional inorganic fillers.3-Aminopropyltriethoxysilane(KH550)modified steel slag(MSS)was successfully prepared,... The chemical composition and high wear resistance of steel slag(SS)make it a potential alternative to traditional inorganic fillers.3-Aminopropyltriethoxysilane(KH550)modified steel slag(MSS)was successfully prepared,and its application in epoxy(EP)anti-corrosion coating was introduced.Due to the grafting of silane coupling agent functional groups onto the surface of SS,MSS exhibited improved solubility in xylene organic solvent and reduced agglomeration.When the MSS content was 15 wt.%,the contact angle of the MSS/EP composite coating was 101°,and the abrasion was only 0.07 g,compared with 56.2°and 0.13 g,respectively,for the pure EP coating.The corrosion resistance of coatings was investigated by performing the electrochemical test(impedance)after immersion in a 3.5 wt.%NaCl solution.The electrochemical test results showed that the impedance modulus of the 15 wt.%MSS/EP composite coating at low frequency(Z_(f)=0.01 Hz)was approximately 1.08×10^(7)Ωcm^(2),which was two orders of magnitude higher than that of the pure EP coating. 展开更多
关键词 Steel slag Silane coupling agent MODIFICATION Epoxy coating inorganic filler
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改性聚四氟乙烯陷阱控制电导分析(英文)
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作者 乌江 王金锋 +1 位作者 沈宾 郑晓泉 《高电压技术》 EI CAS CSCD 北大核心 2011年第11期2786-2792,共7页
The reasonable conduction property is beneficial to release the deposited charges by conduction current in dielectric space charging environment,thus the level of the deep charging and the pulse discharge can effectiv... The reasonable conduction property is beneficial to release the deposited charges by conduction current in dielectric space charging environment,thus the level of the deep charging and the pulse discharge can effectively be weakened and inhibited.A traditional method for conductivity measuring under ground circumstance was used,and both the applied voltage and temperature were varied to determine the dependence of volume conductivity in PTFE modified by different filler contents.The results inferred the volume conductivity was significantly affected by the phenomenon of the percolation conduction,as well as the high-field conduction.The shallow and deep charge traps were considered to be a key factor in volume conductivity variation.In this theory,modified by inorganic semi-conductive filler,the distribution of trap density and depth in PTFE can be controlled to achieve the ideal temperature-dependent conduction property and high-field conduction property,which will finally lead to gentle release of the deposited charges while the electrostatic field reaches the conductivity-variation threshold. 展开更多
关键词 TRAP conduction MODIFICATION polymer inorganic filler anti-deep-charging property
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Fast-ionic conductor Li_(2.64)(Sc_(0.9)Ti_(0.1))_(2)(PO_(4))_(3) doped PVDF-HFP hybrid gel-electrolyte for lithium ion batteries
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作者 WANG Zhen-yu LI Cong +5 位作者 HUANG Ying-de HE Zhen-jiang YAN Cheng MAO Jing DAI Ke-hua ZHENG Jun-chao 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第9期2980-2990,共11页
With increasing demand on energy density of lithium-ion battery,wide electrochemical window and safety performance are the crucial request for next generation electrolyte.Gel-electrolyte as a pioneer for electrolyte s... With increasing demand on energy density of lithium-ion battery,wide electrochemical window and safety performance are the crucial request for next generation electrolyte.Gel-electrolyte as a pioneer for electrolyte solidization development aims to solve the safety and electrochemical window problems.However,low ionic conductivity and poor physical performance prohibit its further application.Herein,a fast-ionic conductor(Li_(2.64)(Sc_(0.9)Ti_(0.1))_(2)(PO_(4))_(3))(LSTP)was added into poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)base gel-electrolyte to enhance mechanical properties and ionic conductivity.Evidences reveal that LSTP was able to weaken interforce between polymer chains,which increased the ionic conductibility and decreased interface resistance during the cycling significantly.The obtained LiFePO_(4)/hybrid gel-electrolyte/Li-metal coin cell exhibited excellent rate capacity(145 mA·h/g at 1C,95 mA·h/g at 3C,28℃)which presented a potential that can be comparable with commercialized liquid electrolyte system. 展开更多
关键词 lithium ion battery hybrid gel-electrolyte fast-ionic conductor inorganic filler electrochemical performance
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Exploring porous zeolitic imidazolate frame work-8(ZIF-8)as an efficient filler for high-performance poly(ethyleneoxide)-based solid polymer electrolytes 被引量:7
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作者 Zhiwen Lei Jinlai Shen +4 位作者 Weide Zhang Qingrong Wang Jun Wang Yonghong Deng Chaoyang Wang 《Nano Research》 SCIE EI CAS CSCD 2020年第8期2259-2267,共9页
Nano Research volume 13,pages2259–2267(2020)Cite this article 277 Accesses 1 Altmetric Metrics details Abstract The incorporation of inorganic fillers into poly(ethyleneoxide)(PEO)-based solid polymer electrolytes(SP... Nano Research volume 13,pages2259–2267(2020)Cite this article 277 Accesses 1 Altmetric Metrics details Abstract The incorporation of inorganic fillers into poly(ethyleneoxide)(PEO)-based solid polymer electrolytes(SPEs)is well known as a low-cost and effective method to improve their mechanical and electrochemical properties.Porous zeolitic imidazolate framework-8(ZIF-8)is firstly used as the filler for PEO-based SPEs in this work.Due to the introduction of ZIF-8,an ionic conductivity of 2.2×10^−5 S/cm(30℃)is achieved for the composite SPE,which is one order of magnitude higher than that of the pure PEO.ZIF-8 also accounts for the broader electrochemical stability window and lithium ion transference number(0.36 at 60℃)of the composite SPE.Moreover,the improved mechanism of ZIF-8 to the composite SPE is investigated by zeta potential and Fourier transform infrared spectrograph characterizations.The stability at the composite SPE/lithium interface is greatly enhanced.The LiFePO4||Li cells using the composite SPE exhibit high capacity and excellent cycling performance at 60℃,i.e.,85%capacity retention with 111 mA·h/g capacity retained after 350 cycles at 0.5 C.In comparison,the cells using the pure PEO show fast capacity decay to 74 mA·h/g maintaining only 68 capacity.These results indicate that the PEO-based SPEs with ZIF-8 are of great promise for the application in solid-state lithium metal batteries. 展开更多
关键词 zeolitic imidazolate framework inorganic fillers solid polymer electrolytes poly(ethyleneoxide) solid-state lithium metal batteries
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3D additive manufactured composite scaffolds with antibiotic-loaded lamellar fillers for bone infection prevention and tissue regeneration 被引量:4
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作者 María C´amara-Torres Stacy Duarte +12 位作者 Ravi Sinha Ainhoa Egizabal Noelia´Alvarez Maria Bastianini Michele Sisani Paolo Scopece Marco Scatto Alessandro Bonetto Antonio Marcomini Alberto Sanchez Alessandro Patelli Carlos Mota Lorenzo Moroni 《Bioactive Materials》 SCIE 2021年第4期1073-1082,共10页
Bone infections following open bone fracture or implant surgery remain a challenge in the orthopedics field.In order to avoid high doses of systemic drug administration,optimized local antibiotic release from scaffold... Bone infections following open bone fracture or implant surgery remain a challenge in the orthopedics field.In order to avoid high doses of systemic drug administration,optimized local antibiotic release from scaffolds is required.3D additive manufactured(AM)scaffolds made with biodegradable polymers are ideal to support bone healing in non-union scenarios and can be given antimicrobial properties by the incorporation of antibiotics.In this study,ciprofloxacin and gentamicin intercalated in the interlamellar spaces of magnesium aluminum layered double hydroxides(MgAl)andα-zirconium phosphates(ZrP),respectively,are dispersed within a thermoplastic polymer by melt compounding and subsequently processed via high temperature melt extrusion AM(~190◦C)into 3D scaffolds.The inorganic fillers enable a sustained antibiotics release through the polymer matrix,controlled by antibiotics counterions exchange or pH conditions.Importantly,both antibiotics retain their functionality after the manufacturing process at high temperatures,as verified by their activity against both Gram+and Gram-bacterial strains.Moreover,scaffolds loaded with filler-antibiotic do not impair human mesenchymal stromal cells osteogenic differentiation,allowing matrix mineralization and the expression of relevant osteogenic markers.Overall,these results suggest the possibility of fabricating dual functionality 3D scaffolds via high temperature melt extrusion for bone regeneration and infection prevention. 展开更多
关键词 Melt extrusion additive manufacturing Antibiotic delivery Lamellar inorganic fillers Bone infection Bone regeneration Human mesenchymal stromal cells
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Polymer-Based Electrolyte for Lithium-Based High-Energy-Density and Safe Energy Storages Devices:Strategy and Mechanisms
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作者 Chenke Tang Leyang Yu +7 位作者 Qinkai Jiang† Rongmeng Gu Yiming Zhang Ziqi Liu Wenlong Cai Hao Wu Yun Zhang Meng Yao 《Renewables》 2024年第5期297-340,共44页
The rapid evolution of lithium-ion batteries over the past decade,coupled with their extensive commercial utilization,has entrenched lithium-ion technology as a cornerstone in the energy-storage field.Despite this est... The rapid evolution of lithium-ion batteries over the past decade,coupled with their extensive commercial utilization,has entrenched lithium-ion technology as a cornerstone in the energy-storage field.Despite this established position,the prevalence of liquid electrolytes in contemporary batteries has been beset by inherent vulnerabilities,including susceptibility to leakage,volatility,and combustibility.In response,polymer electrolytes have emerged as a promising alternative,distinguished by their superior safety profile,elevated energy density,and prolonged operational lifespan.Nevertheless,the widespread adoption of polymer electrolytes also has impediments such as constrained mobility and the propensity for forming lithium dendrite.Addressing these issues is paramount for the further advancement of polymer electrolyte technology.This review aims to provide a comprehensive elucidation of gel polymer electrolytes,solid polymer electrolytes,and composite polymer electrolytes,the predominant subclasses within the field of polymer electrolytes.A systematic exposition of diverse polymer electrolyte formulations,encompassing their respective merits and demerits alongside prospective applications,will be undertaken.Particular emphasis will be put on the strategies applied to ameliorate battery performance to delineate the avenues for potential enhancement in this critical domain. 展开更多
关键词 gel polymers electrolyte solid polymer electrolyte composite polymer electrolyte lithium-based batteries inorganic fillers
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