| Li2CO3-LiOH低共熔锂盐体系合成LiMn2O4及其电化学性能 |
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| 引用本文： | 陈权启,李小栓,杨建东,王先友.Li2CO3-LiOH低共熔锂盐体系合成LiMn2O4及其电化学性能[J].湘潭大学自然科学学报,2011,33(2). |
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| 作者姓名： | 陈权启 李小栓 杨建东 王先友 |
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| 作者单位： | 湘潭大学化学学院,环境友好化学与应用教育部重点实验室,湖南湘潭411105 |
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| 基金项目： | 湖南省教育厅项目(09C947); 湘潭大学博士科研启动基金项目(08QDZ12) |
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| 摘 要： | 以电解二氧化锰(EMD)为锰源,分别以Li2CO3-LiOH低共熔锂盐体系、LiOH和Li2CO3为锂源,通过固相法合成尖晶石型的LiMn2O4正极材料.利用X-射线衍射(XRD)、扫描电镜(SEM)及电化学测试技术对不同条件下合成的LiMn2O4的结构、形貌及电化学性能进行了研究.结果表明,三种锂源合成的产物均为单一的尖晶石型LiMn2O4,但是由Li2CO3 -LiOH低共熔锂盐体系合成的LiMn2O4粒径均小于由LiOH和Li2CO3合成的LiMn2O4;低共熔锂盐体系合成LiMn2O4的容量、循环性能及倍率性能均优于由LiOH和Li2CO3合成的LiMn2O4.由低共熔锂盐体系合成LiMn2O4正极材料0.1C和1C的首次放电容量分别为133 mAh.g-1和110 mAh.g-1,循环30次后,容量保持率分别为87％和86％.
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| 关 键 词： | 低共熔盐 LiMn2O4 正极材料 电化学性能 锂离子电池 |
Electrochemical Performance of LiMn2O4 Synthesized by Eutectic Molten Salt Li2CO3-LiOH |
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| CHEN Quan-qi,LI Xiao-shuan,YANG Jian-dong,WANG Xian-you.Electrochemical Performance of LiMn2O4 Synthesized by Eutectic Molten Salt Li2CO3-LiOH[J].Natural Science Journal of Xiangtan University,2011,33(2). |
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| Authors: | CHEN Quan-qi LI Xiao-shuan YANG Jian-dong WANG Xian-you |
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| Institution: | CHEN Quan-qi*,LI Xiao-shuan,YANG Jian-dong,WANG Xian-you (Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,School of Chemistry,Xiangtan University,Xiangtan 411105 China) |
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| Abstract: | Spinel LiMn2 O4 cathode materials were prepared by solid-state reaction using electrolytic manganese oxide(EMD) as manganese sources,eutectic molten salt Li2 CO3-LiOH,LiOH and Li2 CO3 as lithium sources,respectively.The structure,morphology and electrochemical performance of the prepared LiMn2 O4 were investigated by X-ray diffraction(XRD),scanning electron micrography(SEM) and electrochemical tests.The results show that products synthesized by three kinds of salts are pure spinel LiMn2 O4,the particle size... |
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| Keywords: | eutectic molten salt LiMn2 O4 cathode material electrochemical performance lithium ion battery |
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