TY  - JOUR
AU  - Jiang, Lihua
AU  - Cheng, Yuan
AU  - Wang, Shuping
AU  - Cheng, Yifeng
AU  - Jin, Kaiqiang
AU  - Sun, Jinhua
AU  - Winter, Martin
AU  - Cekic-Laskovic, Isidora
AU  - Wang, Qingsong
TI  - A nonflammable diethyl ethylphosphonate-based electrolyte improved by synergistic effect of lithium difluoro(oxalato)borate and fluoroethylene carbonate
JO  - Journal of power sources
VL  - 570
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2023-05464
SP  - 233051 -
PY  - 2023
AB  - The vital physical and chemical properties of the lithium conducting salt, solvent/co-solvent and functionaladditive determine the overall properties and performance of the resulting electrolyte formulation. Explorationson right combinations of the carefully selected electrolyte components are expected to further balance theelectrochemical and safety performances of chosen electrolyte formulations in given cell chemistries. In thisstudy, a new nonaqueous aprotic electrolyte is designed by using lithium difluoro(oxalato)borate (LiODFB) asconducting salt, diethyl ethylphosphonate (DEEP) as solvent, and fluoroethylene carbonate (FEC) as co-solvent toachieve a nonflammable electrolyte formulation with competent electrochemical performance. The LiODFB andFEC are believed to take part in complex interfacial interactions with a synergistic effect. LiNi0.8Co0.1Mn0.1O2(NCM811)‖Li cells using the optimized electrolyte formulation of 1.3 M LiODFB/DEEP 30% FEC exhibits a stablelong-term cycling performance at 1.0 C with a reversible average specific discharge capacity of 169.5 mAh g􀀀 1during 100 cycles, which is comparable to cells using commercial electrolytes. Furthermore, the 1.3 M LiODFB/DEEP 30% FEC electrolyte shows good thermal stability and effectively reduces the heat generation duringthermal decomposition of NCM811 cathode. The results provide a good reference for the design of next generationof safe, nonflammable electrolytes for lithium-based battery application.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001054211000001
DO  - DOI:10.1016/j.jpowsour.2023.233051
UR  - https://juser.fz-juelich.de/record/1019517
ER  -