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Li2CO3对锂氧化物电极SOFC电化学性能影响研究
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作者 马书涛 王湘楠 +1 位作者 王程远 陈刚 《有色矿冶》 2020年第1期29-33,37,共6页
本文利用机械混合的方式将SrTiO 3与Li 2CO 3按照不同质量比混合制成了比例分别为95/5,90/10,70/30及100/0的STO-x%Li 2CO 3(x=0,5,10和30)复合电解质,并制备了结构为泡沫镍-Ni 0.8 Co 0.15 Al 0.05 LiO 2(NCAL)/STO-x%Li 2CO 3/NCAL-... 本文利用机械混合的方式将SrTiO 3与Li 2CO 3按照不同质量比混合制成了比例分别为95/5,90/10,70/30及100/0的STO-x%Li 2CO 3(x=0,5,10和30)复合电解质,并制备了结构为泡沫镍-Ni 0.8 Co 0.15 Al 0.05 LiO 2(NCAL)/STO-x%Li 2CO 3/NCAL-泡沫镍的单电池。在550℃、H 2/Air气氛中的燃料电池性能测试结果显示在SrTiO 3电解质中以机械混合的方式加入Li 2CO 3后电池的最大功率密度随着碳酸锂的添加量增加而降低,而且在电解质中没有混合Li 2CO 3的SrTiO 3电解质电池取得了最高的最大输功率密度,说明以机械混合的方式在SrTiO 3电解质中加入Li 2CO 3对这种新型结构SOFC的电化学性能没有提升作用。Ni-NCAL阳极在电化学性能测试过程中被还原生成的Li 2CO 3扩散到SrTiO 3电解质中形成的非晶层包覆在电解质颗粒表面对电解质离子电导率提升起到了关键作用。 展开更多
关键词 固体氧化物燃料电池 SrTiO 3电解质 锂氧化物电极 界面传导 碳酸
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尖晶石锂锰氧化物电极首次脱锂过程的EIS研究 被引量:17
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作者 庄全超 樊小勇 +5 位作者 许金梅 陈作锋 董全峰 姜艳霞 黄令 孙世刚 《物理化学学报》 SCIE CAS CSCD 北大核心 2006年第2期234-238,共5页
研究了尖晶石锂锰氧化物电极首次脱锂过程中的电化学阻抗特征.通过选取适当的等效电路拟合实验所得的电化学阻抗谱数据,获得了首次脱锂过程中固体电解质相界面膜(SEI膜)的电阻、电容以及电荷传递电阻、双电层电容等随电极极化电位的变... 研究了尖晶石锂锰氧化物电极首次脱锂过程中的电化学阻抗特征.通过选取适当的等效电路拟合实验所得的电化学阻抗谱数据,获得了首次脱锂过程中固体电解质相界面膜(SEI膜)的电阻、电容以及电荷传递电阻、双电层电容等随电极极化电位的变化规律. 展开更多
关键词 离子电池 尖晶石氧化物电极 电化学阻抗谱 SEI膜
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Enhancement of lithium storage capacity and rate performance of Se-modified MnO/Mn3O4 hybrid anode material via pseudocapacitive behavior 被引量:4
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作者 Lie-wu LI Li-ping WANG +3 位作者 Ming-yu ZHANG Qi-zhong HUANG Ke-jian HE Fei-xiang WU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第7期1904-1915,共12页
To improve rate and cycling performance of manganese oxide anode material,a precipitation method was combined with thermal annealing to prepare the Mn O/Mn3O4/Se Ox(x=0,2)hybrid anode by controlling the reaction tempe... To improve rate and cycling performance of manganese oxide anode material,a precipitation method was combined with thermal annealing to prepare the Mn O/Mn3O4/Se Ox(x=0,2)hybrid anode by controlling the reaction temperature of Mn2O3 and Se powders.At 3 A/g,the synthesized Mn O/Mn3O4/Se Ox anode delivers a discharge capacity of 1007 m A·h/g after 560 cycles.A cyclic voltammetry quantitative analysis reveals that 89.5%pseudocapacitive contribution is gained at a scanning rate of 2.0 m V/s,and the test results show that there is a significant synergistic effect between Mn O and Mn3O4 phases. 展开更多
关键词 lithium-ion battery manganese oxide anode material pseudocapacitive behavior synergistic effect
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Recent progress on Ge oxide anode materials for lithium-ion batteries 被引量:2
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作者 Wei Wei Jianlong Xu +2 位作者 Maotian Xu Shiying Zhang Lin Guo 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第5期515-525,共11页
1 Introduction As environmental pollution continues to worsen,governments are increasing their efforts to develop green transport vehicles,such as electric vehicles and hybrid cars.
关键词 Ge Li Recent progress on Ge oxide anode materials for lithium-ion batteries Figure
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Metal Oxide/graphene composite anode materials for lithium-ion batteries
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作者 LIANG JunFei ZHOU Jing GUO Lin 《Science Foundation in China》 CAS 2013年第1期59-72,共14页
Metal oxides, such as SnO2, Fe2O3, Fe3O4, CoO, Co3O4, NiO, CuO, Cu2O, MnO, Mn3O4, MnO2. etc. , are promising anode materi- als for lithium-ion batteries (LIBs) due to their high capacity and safety characteristics. ... Metal oxides, such as SnO2, Fe2O3, Fe3O4, CoO, Co3O4, NiO, CuO, Cu2O, MnO, Mn3O4, MnO2. etc. , are promising anode materi- als for lithium-ion batteries (LIBs) due to their high capacity and safety characteristics. However, the commercial utility of metal oxide anodes has been hindered to date by their poor cycling per- formance. Recent study shows that metal oxide/ graphene composites show fascinating cycling per- formance as anode materials for lABs. In this re- view, we summarize the state of research on prepa- ration of metal oxide/graphene composites and their I.i storage performance. The prospects and future challenges of metal oxide/graphene compos- ites anode materials for lABs are also discussed. 展开更多
关键词 Metal oxides GRAPHENE Anode mate-rials I.ithium-ion batteries
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Carbon-emcoating architecture boosts lithium storage of Nb_(2)O_(5)
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作者 Qing Ji Zhuijun Xu +8 位作者 Xiangwen Gao Ya-Jun Cheng Xiaoyan Wang Xiuxia Zuo George Z.Chen Binjie Hu Jin Zhu Peter G.Bruce Yonggao Xia 《Science China Materials》 SCIE EI CAS CSCD 2021年第5期1071-1086,共16页
Intercalation transition metal oxides (ITMO)have attracted great attention as lithium-ion battery negative electrodes due to high operation safety,high capacity and rapid ion intercalation.However,the intrinsic low el... Intercalation transition metal oxides (ITMO)have attracted great attention as lithium-ion battery negative electrodes due to high operation safety,high capacity and rapid ion intercalation.However,the intrinsic low electron conductivity plagues the lifetime and cell performance of the ITMO negative electrode.Here we design a new carbon-emcoating architecture through single CO_(2)activation treatment as demonstrated by the Nb_(2)O_(5)/C nanohybrid.Triple structure engineering of the carbon-emcoating Nb_(2)O_(5)/C nanohybrid is achieved in terms of porosity,composition,and crystallographic phase.The carbon-embedding Nb_(2)O_(5)/C nanohybrids show superior cycling and rate performance compared with the conventional carbon coating,with reversible capacity of 387 m A h g(-1)at 0.2 C and 92%of capacity retained after 500cycles at 1 C.Differential electrochemical mass spectrometry(DEMS) indicates that the carbon emcoated Nb_(2)O_(5)nanohybrids present less gas evolution than commercial lithium titanate oxide during cycling.The unique carbon-emcoating technique can be universally applied to other ITMO negative electrodes to achieve high electrochemical performance. 展开更多
关键词 niobium pentoxide/carbon nanohybrids MESOPOROUS CO_(2)activation emcoating lithium-ion battery negative electrode
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