中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Improvement of the high-temperature, high-voltage cycling performance of LiNi0.5Co0.2Mn0.3O2 cathode with TiO2 coating

文献类型:期刊论文

作者Liu, Wen1; Wang, Miao1; Gao, Xing Long2; Zhang, Weidong1; Chen, Jitao1; Zhou, Henghui1; Zhang, Xinxiang1
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2012-12-05
卷号543页码:181-188
关键词Lini0.5co0.2mn0.3o2 Cycling Performance High Temperature Metal Dissolution Tio2 Coating
ISSN号0925-8388
DOI10.1016/j.jallcom.2012.07.074
英文摘要The high-temperature cycling stability at a high cutoff voltage of LiNi0.5Co0.2Mn0.3O2 was improved by TiO2 coating. The mechanism of enhancement was elucidated by electrochemical impedance spectroscopy (EIS). X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analyses. TiO2 coating formed a uniform layer on the surface of LiNi0.5Co0.2Mn0.3O2 particles without changing the crystal structure. Electrochemical tests indicated that TiO2 coating can improve the lithium ion intercalation stability at 328 K and at a high cutoff voltage of 4.4 V. The 1.0% TiO2-coated LiNi0.5Co0.2Mn0.3O2 discharged 149.2 mAh g(-1) after 100 cycles at 0.5C, and maintained 92.1% of the initial discharge capacity. By contrast, the bare sample discharged only 87.7 mAh g(-1) with 48.2% capacity retention. ICP-AES results proved that the TiO2 coating layer can reduce the dissolution of transition metal ions from LiNi0.5Co0.2Mn0.3O2. EIS and XPS confirmed that the improved cycling stability can be attributed to the suppression of the reaction between cathode and electrolyte in lithium-ion batteries. (C) 2012 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000311195000032
出版者ELSEVIER SCIENCE SA
源URL[http://ir.iccas.ac.cn/handle/121111/47925]  
专题中国科学院化学研究所
通讯作者Chen, Jitao
作者单位1.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
2.Pulead Technol Ind Co Ltd, Beijing 102200, Peoples R China
推荐引用方式
GB/T 7714
Liu, Wen,Wang, Miao,Gao, Xing Long,et al. Improvement of the high-temperature, high-voltage cycling performance of LiNi0.5Co0.2Mn0.3O2 cathode with TiO2 coating[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2012,543:181-188.
APA Liu, Wen.,Wang, Miao.,Gao, Xing Long.,Zhang, Weidong.,Chen, Jitao.,...&Zhang, Xinxiang.(2012).Improvement of the high-temperature, high-voltage cycling performance of LiNi0.5Co0.2Mn0.3O2 cathode with TiO2 coating.JOURNAL OF ALLOYS AND COMPOUNDS,543,181-188.
MLA Liu, Wen,et al."Improvement of the high-temperature, high-voltage cycling performance of LiNi0.5Co0.2Mn0.3O2 cathode with TiO2 coating".JOURNAL OF ALLOYS AND COMPOUNDS 543(2012):181-188.

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来源:化学研究所

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