Dual-salts of LiTFSI and LiODFB for high voltage cathode LiNi0.5Mn1.5O4

ISL OpenIR > 青海盐湖研究所知识仓储

	Dual-salts of LiTFSI and LiODFB for high voltage cathode LiNi0.5Mn1.5O4
	Li, Faqiang1,2,3 ; Shangguan, Xuehui 1,3,4; Jia, Guofeng1,2,3,5 ; Wang, Qinglei 1,3,4; Gong, Yan 4,6; Bai, Bin 2,7; Fan, Wei 2,7
	2016-12-01
发表期刊	JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷号	20 期号:12 页码:3491-3498
关键词	Lithium-ion Batteries Dual-salts Electrolyte Aluminum Corrosion Cycling Stability
摘要	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.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6173
专题	青海盐湖研究所知识仓储盐湖资源与化学实验室
作者单位	1.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
推荐引用方式 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.