A lithium salt additive Li2ZrF6 for enhancing the electrochemical performance of high-voltage LiNi0.5Mn1.5O4 cathode | |
Fan, Juntian1,2; Dong, Tao1; Fang, Daliang1,2; Li, Xuefeng1; Mo, Xian'en1; Wen, Kaihua1,2; Chen, Shimou1; Zhang, Suojiang1 | |
刊名 | IONICS |
2018-10-01 | |
卷号 | 24期号:10页码:2965-2972 |
关键词 | Lithium Ion Batteries Electrolyte Additives Lithium Fluorozirconate |
ISSN号 | 0947-7047 |
DOI | 10.1007/s11581-018-2512-8 |
英文摘要 | In this work, Li2ZrF6, a lithium salt additive, is reported to improve the interface stability of LiNi0.5Mn1.5O4 (LNMO)/electrolyte interface under high voltage (4.9 V vs Li/Li+). Li2ZrF6 is an effective additive to serve as an in situ surface coating material for high-voltage LNMO half cells. A protective SEI layer is formed on the electrode surface due to the involvement of Li2ZrF6 during the formation of SEI layer. Charge/discharge tests show that 0.15 mol L-1 Li2ZrF6 is the optimal concentration for the LiNi0.5Mn1.5O4 electrode and it can improve the cycling performance and rate property of LNMO/Li half cells. The results obtained by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) demonstrate that Li2ZrF6 can facilitate the formation of a thin, uniform, and stable solid electrolyte interface (SEI) layer. This layer inhibits the oxidation decomposition of the electrolyte and suppresses the dissolution of the cathode materials, resulting in improved electrochemical performances. |
资助项目 | National Natural Science Foundation of China[91534109] |
WOS关键词 | Li-ion Batteries ; Elevated-temperature ; Liquid Electrolytes ; Perspective ; Challenges ; Stability ; Mechanism ; Surface ; Cells |
WOS研究方向 | Chemistry ; Electrochemistry ; Physics |
语种 | 英语 |
出版者 | SPRINGER HEIDELBERG |
WOS记录号 | WOS:000445155700006 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/26026] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Chen, Shimou; Zhang, Suojiang |
作者单位 | 1.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Fan, Juntian,Dong, Tao,Fang, Daliang,et al. A lithium salt additive Li2ZrF6 for enhancing the electrochemical performance of high-voltage LiNi0.5Mn1.5O4 cathode[J]. IONICS,2018,24(10):2965-2972. |
APA | Fan, Juntian.,Dong, Tao.,Fang, Daliang.,Li, Xuefeng.,Mo, Xian'en.,...&Zhang, Suojiang.(2018).A lithium salt additive Li2ZrF6 for enhancing the electrochemical performance of high-voltage LiNi0.5Mn1.5O4 cathode.IONICS,24(10),2965-2972. |
MLA | Fan, Juntian,et al."A lithium salt additive Li2ZrF6 for enhancing the electrochemical performance of high-voltage LiNi0.5Mn1.5O4 cathode".IONICS 24.10(2018):2965-2972. |
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