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Mixed Lithium Salts Electrolyte Improves the High-Temperature Performance of Nickel-Rich Based Lithium-Ion Batteries
Feng,Dongjin1; Chen,Shimou2; Wang,Rumeng1; Chen,Tianhua3; Gu,Shijie4; Su,Jielong5; Dong,Tao2; Liu,Yuwen1
2020-01-08
Source PublicationJournal of The Electrochemical Society
ISSN0013-4651
Volume167Issue:11
AbstractThe long-term cycle performance of NCM811/Li batteries at high temperature was achieved by mixing LiDFOB and LiPF6 salts into the ethylene carbonate (EC) and ethyl methyl carbonate (EMC) solution (EC/EMC = 3:7 by volume). The differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA) tests indicate 0.8 M LiPF6/0.2 M LiDFOB electrolyte system could improve thermal stability. The NCM811 cell with the mixed lithium salts electrolyte shows superior high temperature cycling performance, as demonstrated by the high capacity retention (89.00%) after 100 cycles at 0.5 C, which is much better than that of the 1.0 M LiPF6 electrolyte (51.34%). Inductively coupled plasma (ICP), Scanning electron microscopy (SEM) and other spectroscopic analyses reveal that adding LiDFOB salt could suppress Ni/Co/Mn dissolution into the electrolyte, due to the LiDFOB salt can be decomposed to produce a protective CEI layer on NCM811 surface. These results show that mixed lithium salts (LiDFOB and LiPF6) is an efficient solution to enhance the high temperature performance of nickel-rich based lithium-ion batteries.
KeywordLithium-ion battery Mixed salts electrolyte Li(Ni0.8Co0.1Mn0.1)O2 High temperature
DOI10.1149/1945-7111/aba4e7
Language英语
WOS IDIOP:0013-4651-167-11-aba4e7
PublisherIOP Publishing
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/41163
Collection中国科学院过程工程研究所
Corresponding AuthorChen,Shimou; Liu,Yuwen
Affiliation1.Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People’s Republic of China
2.Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
3.School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
4.School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People’s Republic of China
5.Zhongshan Qianyou Chemical Materials Co. Ltd., Zhongshan 528400, People’s Republic of China
Recommended Citation
GB/T 7714
Feng,Dongjin,Chen,Shimou,Wang,Rumeng,et al. Mixed Lithium Salts Electrolyte Improves the High-Temperature Performance of Nickel-Rich Based Lithium-Ion Batteries[J]. Journal of The Electrochemical Society,2020,167(11).
APA Feng,Dongjin.,Chen,Shimou.,Wang,Rumeng.,Chen,Tianhua.,Gu,Shijie.,...&Liu,Yuwen.(2020).Mixed Lithium Salts Electrolyte Improves the High-Temperature Performance of Nickel-Rich Based Lithium-Ion Batteries.Journal of The Electrochemical Society,167(11).
MLA Feng,Dongjin,et al."Mixed Lithium Salts Electrolyte Improves the High-Temperature Performance of Nickel-Rich Based Lithium-Ion Batteries".Journal of The Electrochemical Society 167.11(2020).
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