Solid-state Graft Polymer Electrolytes with Conductive Backbones and Side-chains for Lithium Batteries

24 February 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Graft polymers have been widely investigated as solid polymer electrolytes (SPEs) in the past decades. However, the presence of insulating backbones in the conventional graft polymers damps the overall Li+ conductivity and transport number (tLi+). Herein, a series of polycarbonates (PCs) possessing ethylene oxide (EO) side-chains were designed and synthesized through ring-opening polymerization (ROP), and their ionic conductivities were evaluated as SPEs with LiTFSI. The synergy of conductive backbones and side-chains gives a high tLi+ value of 0.67, while having an ionic conductivity of 210-5 S cm-1 at 30 C. This work provides new insights into the development of high-performance SPEs by combining different conductive polymers.


ring-opening polymerization
polymer electrolyte
ionic conductivity

Supplementary materials

Supporting Information
Experimental methods, additional NMR spectra, DSC curve, and FT-IR spectra.


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