Elimination of Fluorination: The Influence of Fluorine-Free Electrolytes on the Performance of LiNi_1/3Mn_1/3Co_1/3O₂/Silicon-Graphite Li-Ion Battery Cells.

ABSTRACT: In the quest for environmentally friendly and safe batteries, moving from fluorinated electrolytes that are toxic and release corrosive compounds, such as HF, is a necessary step. Here, the effects of electrolyte fluorination are investigated for full cells combining silicon-graphite composite electrodes with LiNi_1/3Mn_1/3Co_1/3O₂ (NMC111) cathodes, a viable cell chemistry for a range of potential battery applications, by means of electrochemical testing and postmortem surface analysis. A fluorine-free electrolyte based on lithium bis(oxalato)borate (LiBOB) and vinylene carbonate (VC) is able to provide higher discharge capacity (147 mAh g_NMC ^-1) and longer cycle life at C/10 (84.4% capacity retention after 200 cycles) than a

SUBMITTER: Hernandez G 

PROVIDER: S-EPMC7493211 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature