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| 固体电解质包覆LiMn2O4正极材料的合成及表征 | |
| 引用本文： | 吴显明. 固体电解质包覆LiMn2O4正极材料的合成及表征[J]. 精细化工, 2011, 28(2): 116-119 |
| 作者姓名： | 吴显明 |
| 作者单位： | 1. 吉首大学,化学化工学院,湖南,吉首,416000;湘西自治州矿产与新材料技术创新服务中心,湖南,吉首,416000 2. 吉首大学,化学化工学院,湖南,吉首,416000 3. 吉首大学,林产化工工程湖南省重点实验室,湖南,张家界,427000 |
| 基金项目： | 湖南省科技厅资助项目(2009FJ3045); 吉首大学大学生研究型学习和创新实验计划资助项目~~ |
| 摘 要： | 采用湿化学法制备Li1.3Al0.3Ti1.7(PO4)3包覆LiMn2O4。采用X射线衍射、扫描电镜、恒电流充放电等技术对合成产物进行物相、形貌和电化学分析。结果表明:Li1.3Al0.3Ti1.7(PO4)3包覆LiMn2O4与LiMn2O4有相似的X射线衍射结果,且包覆后的LiMn2O4循环伏安峰电流和电荷转移阻抗变化不大。室温及55℃,以0.2 C充放电倍率循环40次时,Li1.3Al0.3Ti1.7(PO4)3包覆LiMn2O4的容量保持率分别为98.2%和93.7%,未包覆的LiMn2O4的容量保持率分别为85.4%和79.1%。当以2 C倍率室温充放电循环时,Li1.3Al0.3Ti1.7(PO4)3包覆LiMn2O4的容量保持率比未包覆的LiMn2O4高8%;55℃充放电循环时,Li1.3Al0.3Ti1.7(PO4)3包覆LiMn2O4的容量保持率比未包覆的LiMn2O4高11.1%。 |
| 关 键 词： | 锂离子电池 包覆 电化学 固体电解质 功能材料 |
| 收稿时间： | 2010-11-08 |
| 修稿时间： | 2010-11-23 |
Synthesis and characterization of Li1.3Al0.3Ti1.7(PO4)3-coated LiMn2O4 |
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| WU Xian-ming. Synthesis and characterization of Li1.3Al0.3Ti1.7(PO4)3-coated LiMn2O4[J]. Fine Chemicals, 2011, 28(2): 116-119 | |
| Authors: | WU Xian-ming |
| Affiliation: | WU Xian-ming1,2,TAN Lei1,LI Ming1,YU Yi-ping1,XIAO Zhuo-bing3(1.College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan,China,2.Xiangxi Ores and New Materials Development and Service Center,3.Key Laboratory for Forest Products and Chemical Industry Engineering of Hunan Province,Zhangjiajie 427000,China) |
| Abstract: | Li1.3Al0.3Ti1.7(PO4)3-coated LiMn2O4 was prepared by the wet chemical route.The phase,surface morphology,and the electrochemical properties of the prepared powders were characterized by X-ray diffraction,scanning electron micrograph,and galvanostatic charge-discharge experiments.Li1.3Al0.3Ti1.7(PO4)3-coated LiMn2O4 has the similar X-ray diffraction patterns,cyclic voltammograms,and charge-transfer resistance as LiMn2O4.The two powders show the similar values of lithium-ion diffusion coefficient.When cycled ... |
| Keywords: | lithium-ion battery coating electrochemistry solid state electrolyte functional materials |
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