| 简易评价LiMn2O4系材料在电解液中化学稳定性 |
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| 引用本文： | 吕东生,陶英,李伟善.简易评价LiMn2O4系材料在电解液中化学稳定性[J].电源技术,2005,29(6):357-360. |
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| 作者姓名： | 吕东生 陶英 李伟善 |
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| 作者单位： | 华南师范大学,化学系,广东,广州,510631 |
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| 基金项目： | 国家自然科学基金;广东省自然科学基金;广东省教师资助项目 |
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| 摘 要： | 元素Mn在电解液中的溶出造成的容量损失是尖晶石锂锰氧化物系列材料容量衰减的主要原因之一。在电解液中的化学稳定性是评价尖晶石锂锰氧化物系列材料或锂离子蓄电池电解质性能的重要指标之一。通过测量尖晶石锂锰氧化物系列材料粉末微电极在电解液中的开路电位随贮存时间的变化,估算出其在电解液中的相对平均溶解速率来评价LiMn2O4系列材料在电解液中的化学稳定性。该方法具有测试设备简单、测试过程简便快捷、结果可靠的特点。
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| 关 键 词： | Mn溶出 电解液分解 化学稳定性 开路电位 |
| 文章编号： | 1002-087X(2005)06-0357-04 |
| 修稿时间： | 2004年9月1日 |
A simple method on evaluating chemical stability of LiMn2O4 and its derivants in electrolyte |
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| L Dong-sheng,TAO Ying,LI Wei-shan.A simple method on evaluating chemical stability of LiMn2O4 and its derivants in electrolyte[J].Chinese Journal of Power Sources,2005,29(6):357-360. |
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| Authors: | L Dong-sheng TAO Ying LI Wei-shan |
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| Affiliation: | L(U) Dong-sheng,TAO Ying,LI Wei-shan |
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| Abstract: | Mn dissolution into electrolyte is one of the major reasons for capacity fading of spinel LiMn2O4 and its derivants. Chemical stability of spinel LiMn2O4 and its derivants in electrolyte is an important standard to evaluate the spinel LiMn2O4 and its derivants or electrolytes. In this paper the relative average dissolution rate of spinel LiMn2O4 and its derivants, which can be used to evaluate chemical stability of these materials, was estimated by open circuit potential (OCP) variation curve of LiMn2O4 or its derivants powder microelectrode in electrolyte with storage time. It proves that the method is simple and convenient with credible results. |
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| Keywords: | Mn dissolution electrolyte decompose chemical stability open circuit potential |
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