| LiCo_(0.90)Al_(0.1)O_2的表面包覆及其性能研究 |
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| 引用本文： | 徐秋红,张士国,李大枝.LiCo_(0.90)Al_(0.1)O_2的表面包覆及其性能研究[J].应用化工,2007,36(9):885-887. |
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| 作者姓名： | 徐秋红 张士国 李大枝 |
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| 作者单位： | 滨州学院,化学与化工系,山东,滨州,256603 |
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| 基金项目： | 滨州学院校科研和教改项目 |
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| 摘 要： | 通过化学处理方法在LiCo0.90Al0.1O2的表面包覆后,在300℃下热处理6 h,得到表面包覆Al2O3的LiCo0.90Al0.1O2。SEM分析表明,包覆前表面光滑,包覆后可以明显看到晶粒表面粘有许多小颗粒。当充电到4.5 V时,包覆后的材料具有较好的充放电平台、较高的充放电容量和首次充放电效率,但是包覆后材料的首次充电容量有所下降。
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| 关 键 词： | 锂离子电池 包覆 LiCo0.90Al0.1O2 Al2O3 |
| 文章编号： | 1671-3206（2007）09-0885-03 |
| 修稿时间： | 2007-06-30 |
Study of Al2O3 coated LiCo0.90Al0.1O2 as cathode materials for lithium ion batteries |
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| XU Qiu-hong,ZHANG Shi-guo,LI Da-zhi.Study of Al2O3 coated LiCo0.90Al0.1O2 as cathode materials for lithium ion batteries[J].Applied chemical industry,2007,36(9):885-887. |
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| Authors: | XU Qiu-hong ZHANG Shi-guo LI Da-zhi |
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| Affiliation: | Department of Chemistry and Chemical Engineering, Binzhou University, Binzhou 256603, China |
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| Abstract: | The surface of LiCo0.90Al0.1O2 was modified with Al2O3 by a chemical processing procedure followed by heat treatment at 300 ℃ in air for 6 h.SEM demonstrated that the surface of uncoated LiCo0.90Al0.1O2 was very smooth,while the surface of coated LiCo0.90Al0.1O2 was not smooth with many particles.The surface modified LiCo0.90Al0.1O2 samples showed much better charge and discharge capacity as well as the efficiency than the uncoated LiCoO2 cathode to higher cutoff charge voltage of as high as 4.5 V,though the first charge capacities of the surface modified LiCo0.90Al0.1O2 samples were decreased. |
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| Keywords: | LiCo0 90Al0 1O2 Al2O3 |
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