Polymer Competitive Solvation Reduced Propylene Carbonate Cointercalation in a Graphitic Anode

• DOI: 10.1021/acs.nanolett.2c04898
• Publication Date: 2023-03-16T12:27:26Z
• Authors: Qiuyan Liu; Shiwei Xu; Xiaoyun Li; Renjie Chen; Xuefeng Wang; Yurui Gao; Zhaoxiang Wang; Liquan Chen
• Keywords: Propylene carbonate

Polymer electrolytes have been studied as an alternative to organic liquid but suffer from low ionic conductivity. Propylene carbonate (PC) proves be interesting solvent is incompatible with graphitic anodes due its cointercalation effect. In this work, adding poly(ethylene oxide) (PEO) into a PC-based electrolyte can alter the solvation structure well transform solution polymer high By spectroscopic techniques and calculations, we demonstrate that PEO compete PC in solvating Li+ ions, reducing Li+-PC bond strength, making it easier for desolvated. Due unique structure, PC-cointercalation-induced graphite exfoliation inhibited, reduction stability of improved. This work will extend applications electrolytes, deepen understandings spur designs advanced electrolytes.