| 不同维度炭材料对Li4Ti5O12/C阳极电化学性能的影响 |
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| 引用本文： | 张标,杜鸿达,李宝华,康飞宇. 不同维度炭材料对Li4Ti5O12/C阳极电化学性能的影响[J]. 电源技术, 2010, 34(3) |
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| 作者姓名： | 张标 杜鸿达 李宝华 康飞宇 |
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| 作者单位： | 清华大学,深圳研究生院新材料所,广东,深圳,518055;清华大学,材料科学与工程系,北京,100084;清华大学,材料科学与工程系,北京,100084;清华大学,深圳研究生院新材料所,广东,深圳,518055 |
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| 基金项目： | 国家自然科学基金(50802049;50632040);;深圳市科技计划项目(JP200806230010A;SG200810150054A) |
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| 摘 要： | 选取三种不同维度的炭材料[乙炔黑(AB)、纳米碳纤维(CNF)、膨胀石墨微粉(EG)]作为Li4Ti5O1(2简称LTO)的导电添加剂,研究了LTO/C复合电极的电化学性能。倍率放电以及电化学阻抗谱,结果表明在AB导电剂中添加CNF,形成了一个有利于电子输运的三维导电网络,LTO/(AB+CNF)电极表现出良好的大电流放电性能;二维结构EG的加入不利于锂离子的快速输运,降低了LTO的大电流放电性能。进一步研究发现,在LTO烧结前加入CNF能够形成外形规则、粒径小、分布均匀的LTO晶粒,进一步提高了材料的电化学性能。
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| 关 键 词： | Li4Ti5O12 复合电极 纳米碳纤维 膨胀石墨 |
Dimension effect of conducting carbon additives on the electrochemical properties of Li4Ti5O12/C anode in lithium-ion battery |
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| ZHANG Biao,DU Hong-da,LI Bao-hua,KANG Fei-yu. Dimension effect of conducting carbon additives on the electrochemical properties of Li4Ti5O12/C anode in lithium-ion battery[J]. Chinese Journal of Power Sources, 2010, 34(3) |
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| Authors: | ZHANG Biao DU Hong-da LI Bao-hua KANG Fei-yu |
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| Affiliation: | 1.Advanced Materials Institute;Graduate School at Shenzhen;Tsinghua University;Shenzhen Guangdong 518055;China;2.Department of Materials Science and Engineering;Beijing 100084;China |
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| Abstract: | Three types of carbon materials,acetylene black (AB),carbon nanofiber (CNF),and expanded graphite (EG) were selected to improve the high-rate properties of Li4Ti5O12 (LTO)/C anode for lithium-ion battery by rate discharging and EIS.The test results show that the conductivity is improved by adding CNF to AB conducting additives.The composite electrode LTO/(AB+CNF) shows excellent discharge properties at different current densities.The discharge capacity goes down quickly when EG is added because it blocks th... |
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| Keywords: | Li4Ti5O12 composite electrode carbon nanofiber expanded graphite |
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