%0 Journal Article
%A Jia, Hao
%A Onishi, Hitoshi
%A von Aspern, Natascha
%A Rodehorst, Uta
%A Rudolf, Katharina
%A Billmann, Bastian
%A Wagner, Ralf
%A Winter, Martin
%A Cekic-Laskovic, Isidora
%T A propylene carbonate based gel polymer electrolyte for extended cycle life and improved safety performance of lithium ion batteries
%J Journal of power sources
%V 397
%@ 0378-7753
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2018-04897
%P 343 - 351
%D 2018
%X A poly(vinylidene difluoride-co-hexafluoropropylene) (PVdF-HFP)-based gel polymer electrolyte (GPE) containing propylene carbonate (PC)-based liquid electrolyte was developed to enhance the safety performance of LiNi0.5Mn0.3Co0.2O2/graphite (NMC532/graphite) lithium ion batteries. The PC-based liquid electrolyte (PEV-LE) consists of 1 mol L−1 LiPF6 as lithium salt, PC as the main solvent and ethylene sulfite (ES, 2% by weight) as well as vinylene carbonate (VC, 2% by weight) as solid electrolyte interphase (SEI) forming additives. Electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) revealed that the combination of ES and VC additives facilitates the formation of effective interphases at the respective electrolyte/electrode interfaces, thus contributing to a remarkable cycle life of NMC532/graphite cell comprising PEV-GPE. Flash point measurements and differential scanning calorimetry (DSC) confirmed significantly improved safety performance of PEV compared to the state-of-the-art electrolyte. PEV-GPE is a promising alternative to state-of-the-art electrolyte as it shows extended cycle life and enhanced thermal stability in NMC532/graphite lithium ion cells.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000445317900041
%R 10.1016/j.jpowsour.2018.07.039
%U https://juser.fz-juelich.de/record/851197