| TiO_2包覆的尖晶石LiMn_2O_4的电化学性能 |
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| 引用本文： | 冯传启,李华,王世银,李丽. TiO_2包覆的尖晶石LiMn_2O_4的电化学性能[J]. 电池, 2009, 39(5) |
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| 作者姓名： | 冯传启 李华 王世银 李丽 |
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| 作者单位： | 湖北大学化学与化工学院,湖北,武汉,430062 |
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| 摘 要： | 用超声波振荡法,将粒径约为20 nm、用溶胶-凝胶法合成的TiO2颗粒包覆在流变相法合成的LiMn2O4表面,再在600 ℃下处理2 h,得到TiO2包覆的尖晶石LiMn2O4.在3.0～4.4 V,产物以1.0 C充放电的首次放电比容量为121.7 mAh/g,第100次循环的放电比容量为108.3 mAh/g;以0.5 C充放电的首次放电比容量为126.7 mAh/g,第200次循环的容量保持率为86.0%.
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| 关 键 词： | 锂离子电池 尖晶石 二氧化钛(TiO2) 流变相反应 |
Electrochemical performance of spinel LiMn_2O_4 coated with TiO_2 |
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| FENG Chuan-qi,LI Hua,WANG Shi-yin,LI Li. Electrochemical performance of spinel LiMn_2O_4 coated with TiO_2[J]. Battery Bimonthly, 2009, 39(5) |
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| Authors: | FENG Chuan-qi LI Hua WANG Shi-yin LI Li |
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| Affiliation: | FENG Chuan-qi,LI Hua,WANG Shi-yin,LI Li(Department of Chemistry , Chemical Engineering,Hubei University,Wuhan,Hubei 430062,China) |
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| Abstract: | TiO_2 with particle size about 20 nm prepared by sol-gel method was coated on the surface of LiMn_2O_4 prepared by rhe-ological phase reaction method via ultrasonic wave oscillation method, then treated at 600 ℃ for 2 h to obtain the spinel LiMn_2O_4 coated with TiO_2. At 3.0～4.4 V, the initial specific discharge capacity of the product charge-discharge at 1.0 C was 121.7 mAh/g,the specific discharge capacity at the 100th cycle was 108.3 mAh/g,the initial specific discharge capacity charge-discharge at 0.5 C was 126.7 mAh/g,the capacity retention at the 200th cycle was 86.0%. |
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| Keywords: | Li-ion battery spinel titanium dioxide(TiO2) rheological phrase reaction |
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