| Mn4+-掺杂锂钒氧化物的合成及其电化学性能 |
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| 引用本文： | 陈一维,张颖,汪大云,韩恩山.Mn4+-掺杂锂钒氧化物的合成及其电化学性能[J].材料研究学报,2011(2):205-208. |
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| 作者姓名： | 陈一维 张颖 汪大云 韩恩山 |
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| 作者单位： | 河北工业大学化工学院;河北工业大学理学院; |
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| 摘 要： | 以LiOH·H2O、NH4VO3和Mn(CH3COO)2·4H2O为原料,以柠檬酸(C6H8O7·H2O)为络合剂,用凝胶溶胶法按xLiV3O8·yLiMn2O4(x∶y=1∶0,4∶1,8∶l,12∶1,16∶1)合成出锂离子电池正极材料Mn4+-LiV3O8,并对其结构和电化学性能进行了研究.结果表明,用该法制备的...
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| 关 键 词： | 无机非金属材料 锂离子电池正极材料 掺杂 循环伏安 溶胶凝胶法 |
Synthesis and Electrochemical Performance of Mn~(4+) Doped Lithium Vanadium Oxide |
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| CHEN Yiwei ZHANG Ying WANG Dayun HAN Enshan .School of Chemical Engineering , Technology,Hebei University of Technology,Tianjin .School of Sciences,Tianjin.Synthesis and Electrochemical Performance of Mn~(4+) Doped Lithium Vanadium Oxide[J].Chinese Journal of Materials Research,2011(2):205-208. |
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| Authors: | CHEN Yiwei ZHANG Ying WANG Dayun HAN Enshan School of Chemical Engineering Technology Hebei University of Technology Tianjin School of Sciences Tianjin |
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| Affiliation: | CHEN Yiwei~1 ZHANG Ying~(1*) WANG Dayun~2 HAN Enshan~1 1.School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130 2.School of Sciences,Tianjin 300130 |
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| Abstract: | According to the stoichiometric ratio of xLiV3O8·yLiMn2O4（x:y=1:0,4:1,8:1,12:1, 16:1）,lithium vanadium oxide Mn4+-LiV3O8 was synthesized by a sol-gel method with LiOH·H2O, NH4VO3,Mn（CH3COO）2·4H2O and C6H8O7·H2O as starting materials,and its electrochemical characterization and structure has been investigated.The results show that the Mn4+-LiV3O8 made by sol-gel method has well-developed crystal structure of layered LiV3O8 and a good charge-discharge characterization. The initial discharge specific capacity with Mn4+ doping at x:y=12:1 reaches 387.9 mAh/g, which is 29.3%larger than that of pure material（299.9 mAh/g）,and keeps 376.4 mAh/g after 30 cycles when cycles at 0.1C rate over the voltage range of 1.8-3.8 V.Further-more,the material preserves a high charge-discharge efficiency above 97%. |
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| Keywords: | inorganic non-metallic lithium-ion battery cathode material doping cyclic voltammogram sol-gel method |
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