Jump to main content
Jump to site search


A Si-doped flexible self-supporting comb-like polyethylene glycol copolymer (Si-PEG) film as a polymer electrolyte for an all solid-state lithium-ion battery

Author affiliations

Abstract

Herein, a self-supporting comb-like Si-PEG copolymer with flexible Si–O–C bonds in the main chain and pending short PEG chains as the side chain was synthesized to improve the low temperature performance and overcome the quandary between good mechanical and electrochemical properties of the polymer electrolyte in lithium-ion batteries. The tensile strength of Si-PEG polymer electrolytes (SPH15) is 0.8 MPa at 30 °C, which is high enough to inhibit the growth of lithium dendrites. The ion conductivities of Si-PEG (SPH15) are 1.2 × 10−4 S cm−1 at 30 °C and 3.2 × 10−5 S cm−1 at 10 °C, which are one order of magnitude higher than those for PEG-based copolymer electrolytes without Si doping. The assembled LiFePO4/SPH15/Li half batteries can deliver the specific capacities of 84 mA h g−1 at 10 °C and present 75% capacity retention after 500 charge–discharge cycles at 0.5C.

Graphical abstract: A Si-doped flexible self-supporting comb-like polyethylene glycol copolymer (Si-PEG) film as a polymer electrolyte for an all solid-state lithium-ion battery

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Sep 2017, accepted on 31 Oct 2017 and first published on 01 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA07741F
Citation: J. Mater. Chem. A, 2017, Advance Article
  •   Request permissions

    A Si-doped flexible self-supporting comb-like polyethylene glycol copolymer (Si-PEG) film as a polymer electrolyte for an all solid-state lithium-ion battery

    X. Ji, H. Zeng, X. Gong, F. Tsai, T. Jiang, R. K. Y. Li, H. Shi, S. Luan and D. Shi, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA07741F

Search articles by author

Spotlight

Advertisements