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| Pt元素添加提高LiCoO2的电化学性能 | |
| 引用本文： | 杜柯,其鲁,王银杰,张宏. Pt元素添加提高LiCoO2的电化学性能[J]. 无机材料学报, 2005, 20(2): 351-358 |
| 作者姓名： | 杜柯 其鲁 王银杰 张宏 |
| 作者单位： | 1. 北京大学化学与分子工程学院新能源与技术实验室,北京,100871 2. 北京理工大学电子工程系,北京,100081 3. 中国科学院上海微系统与信息技术研究所,上海,200050 |
| 摘 要： | 研究了Pt掺杂对LiCoO2电化学性能的影响．以氧化物形式将少量Pt元素引入到LiCoO2中，发现形成了LiCoO2-Li2PtO3-Pt混合化合物系统．比较了纯LiCoO2和该LiCoO2基复合材料的电化学性能，结果显示复合材料具有比纯LiCoO2材料优秀得多的倍率性能，表明Li离子在该复合化合物中有更快的扩散速率，恒电流滴定实验结果也证明了这一点． |
| 关 键 词： | LiCoO2基复合材料 Pt元素添加 放电倍率 扩散 |
| 文章编号： | 1000-324X(2005)02-0351-08 |
| 收稿时间： | 2004-02-06 |
| 修稿时间： | 2004-02-24 |
Improved Electrochemical Performance of LiCoO2 due to Pt Additive |
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| Du Ke,QI Lu,WANG Yin-jie,ZHANG Hong. Improved Electrochemical Performance of LiCoO2 due to Pt Additive[J]. Journal of Inorganic Materials, 2005, 20(2): 351-358 | |
| Authors: | Du Ke QI Lu WANG Yin-jie ZHANG Hong |
| Affiliation: | 1.DepartmentofAppliedChemistry;CollegeofChemistry&MolecularEngineeringPekingUniversity;Beijing100871;China;2.DepartmentofElectronicEngineering;BeijingInstituteofTechnology;Beijing100081,China;3.ShanghaiInstituteofMicrosystemandInformationTechnology;ChineseAcademyofSciences;Shanghai200050;China |
| Abstract: | The influence of the initial addition of Pt on the microstructure and electrochemical properties of synthesized LiCoO2-based material was investigated. A small amount of Pt additive induces Li2PtO3 and Pt in matrix LiCoO2 to form a multi-phase composite. This multi-phase composite shows the improved rate performance and cycleability at high rate in comparison with the single-phase of LiCoO2. This behavior is attributed to the enhanced diffusion of Li ion in the LiCoO2 matrix, which can be demonstrated by galvanostatic intermittent titration technique. |
| Keywords: | LiCoO2-based multi-phase composite Pt element additive discharge rate diffusion |
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