Single lithium-ion polymer electrolytes based on poly(ionic liquid)s for lithium-ion batteries

• DOI: 10.1039/c8sm00907d
• Publication Date: 2018-07-10T07:04:41Z
• Authors: Yang Yu; Fei Lu; Na Sun; Aoli Wu; Wei Pan; Liqiang Zheng
• Keywords: Polymer Electrolytes

A promising method of synthesizing a lithium-containing room temperature polymeric ionic liquid (PIL) by utilizing the zwitterionic effect to turn lithium salt into for single lithium-ion conduction was proposed. In this work, PIL constructed equimolar monomer mixture zwitterion 3-(1-vinyl-3-imidazolic)propanesulfonate (VIPS) and 4-styrenesulfnny(trifluoromethylsulfony)imde (LiSTFSI) based on intermolecular electrostatic interactions. situ photopolymerization with flexible chain poly(ethylene glycol)methyl ether methacrylate (PEGM) cross-linker glycol)dimethacrylate (PEGDM) in presence propylene carbonate (PC) generated free-standing electrolyte films. The electrolytes Li+-rich channels have an excellent transference number approaching unity (0.93 at temperature) while attaining comparable conductivity (σ ≈ 1.31 × 10-4 S cm-1 30 °C). charge-discharge performance Li/LiFePO4 half-cell equipped would provide model system novel ion conductors.