Effect of Fluoroethylene Carbonate in the Electrolyte for LiNi0.5Mn1.5O4 Cathode in Lithium-ion Batteries

• DOI: 10.33961/jecst.2017.8.1.53
• Publication Date: 2019-03-27T05:29:46Z
• Authors: Jaemin Kim; Nakgyu Go; Hyunchul Kang; Artur Tron; Junyoung Mun
• Keywords: Interphase; Lithium carbonate

Fluoroethylene carbonate (FEC) was studied as an additive for the electrolyte in lithium ion batteries with LiNi0.5Mn1.5O4 (LNMO) spinel cathode operating at a high potential beyond 4.7 V (vs. Li/Li+). It found that FEC electrochemically active 1st charge cycle on LNMO cathode. The presence of large amount (more than 40 vol%) caused severe side reactions abnormally long voltage plateaus. In contrast, when contained less 30 vol% , surface stabilized by formation solid-electrolyte interphase (SEI), leading to improved cyclability. However, resistance from SEI limited rate capability because sluggish transportation through and electronic insulation between particles electrode. Keywords: LNMO, Electrolyte, High electrode,