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Dual-salts of LiTFSI and LiODFB for high voltage cathode LiNi0.5Mn1.5O4
Li, Faqiang1,2,3; Shangguan, Xuehui1,3,4; Jia, Guofeng1,2,3,5; Wang, Qinglei1,3,4; Gong, Yan4,6; Bai, Bin2,7; Fan, Wei2,7
2016-12-01
Source PublicationJOURNAL OF SOLID STATE ELECTROCHEMISTRY
ISSN1432-8488
Volume20Issue:12Pages:3491-3498
Abstract

The LiNi0.5Mn1.5O4 has been investigated as promising because of its high operating voltage (4.7 V vs. Li+/Li) and decent specific capacity. Despite these advantages, however, the market penetration of this material was significantly hindered by the lack of proper electrolytes that can work stably up to 5 V. To achieve better cycling stability, mixed salts of lithium bis (trifluoromethanesulfonylimide) (LiTFSI) and lithium difluoro (oxalate) borate (LiODFB) are used in LiNi0.5Mn1.5O4-based batteries to replace the lithium hexafluoride phosphate (LiPF6) salt in non-aqueous electrolytes. The SEM and CV data indicate that the corrosion to Al current collector caused by LiTFSI-based electrolytes under high voltage (similar to 5 V vs. Li+/Li) can be largely reduced by adding LiODFB into LiTFSI-based electrolytes. And a boron-based passivation layer from the oxidative decomposition of LiODFB to suppress the corrosion based on the XPS tests results. In addition, the LiTFSI0.5-LiODFB0.5-based electrolyte has better cycling stability and rate capability for LiNi0.5Mn1.5O4-based cells than LiPF6-based electrolyte.

KeywordLithium-ion Batteries Dual-salts Electrolyte Aluminum Corrosion Cycling Stability
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10008-016-3313-5
Indexed BySCI
Language英语
WOS KeywordLITHIUM-ION BATTERIES ; ALUMINUM CURRENT COLLECTOR ; LIFEPO4-BASED BATTERIES ; SPINEL LINI0.5MN1.5O4 ; ELECTROLYTES ; LIPF6 ; CORROSION ; SUPPRESSION ; STABILITY ; LIBOB
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNatural Science Foundation of China(U1507106 ; Natural Science Foundation of Qinghai Province(2015-ZJ-935Q) ; U1507114)
WOS IDWOS:000388506300029
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21685
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
2.Qinghai Res Ctr Low Temp Lithium Ion Battery Tech, Xining 810008, Peoples R China
3.Chinese Acad Sci, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Cent S Univ, Changsha 410083, Hunan, Peoples R China
6.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
7.Qinghai Green Grass New Energy Technol Co Ltd, Xining 810001, Peoples R China
Recommended Citation
GB/T 7714
Li, Faqiang,Shangguan, Xuehui,Jia, Guofeng,et al. Dual-salts of LiTFSI and LiODFB for high voltage cathode LiNi0.5Mn1.5O4[J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY,2016,20(12):3491-3498.
APA Li, Faqiang.,Shangguan, Xuehui.,Jia, Guofeng.,Wang, Qinglei.,Gong, Yan.,...&Fan, Wei.(2016).Dual-salts of LiTFSI and LiODFB for high voltage cathode LiNi0.5Mn1.5O4.JOURNAL OF SOLID STATE ELECTROCHEMISTRY,20(12),3491-3498.
MLA Li, Faqiang,et al."Dual-salts of LiTFSI and LiODFB for high voltage cathode LiNi0.5Mn1.5O4".JOURNAL OF SOLID STATE ELECTROCHEMISTRY 20.12(2016):3491-3498.
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