Toward robust solid-state lithium metal batteries by stabilizing a polyethylene oxide-based solid electrolyte interface with a biomass polymer filler

Ben Hu; Shichang Han; Jiaxue Zhang; Acheng Zhu; Zengjie Fan; Tiezhu Xu; Chong Xu; Zhaoming Huang; Tianyu Zhu; Jie Xu

doi:10.1016/j.jcis.2023.06.183

Toward robust solid-state lithium metal batteries by stabilizing a polyethylene oxide-based solid electrolyte interface with a biomass polymer filler

J Colloid Interface Sci. 2023 Nov 15;650(Pt A):203-210. doi: 10.1016/j.jcis.2023.06.183. Epub 2023 Jun 27.

Authors

Ben Hu¹, Shichang Han², Jiaxue Zhang¹, Acheng Zhu³, Zengjie Fan⁴, Tiezhu Xu⁴, Chong Xu⁴, Zhaoming Huang¹, Tianyu Zhu¹, Jie Xu⁵

Affiliations

¹ College of Mechanical Engineering, Wanjiang University of Technology, Ma'anshan, 243031, China.
² College of Mechanical Engineering, Wanjiang University of Technology, Ma'anshan, 243031, China; School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China.
³ School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China.
⁴ Jiangsu Key Laboratory of Electrochemical Energy-Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
⁵ School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China. Electronic address: xu_jie@ahut.edu.cn.

PMID: 37402326
DOI: 10.1016/j.jcis.2023.06.183

Abstract

Achieving all-solid-state lithium-based batteries with high energy densities requires lightweight and ultrathin solid-state electrolytes (SSEs) with high Li⁺ conductivity, but this still poses significant challenges. Herein, we designed a robust and mechanically flexible SSE (denoted BC-PEO/LiTFSI) by using an environmentally friendly and low-cost approach that involves bacterial cellulose (BC) as a three-dimensional (3D) rigid backbone. In this design, BC-PEO/LiTFSI is tightly integrated and polymerized through intermolecular hydrogen bonding, and the rich oxygen-containing functional groups from the BC filler also provide the active site for Li⁺ hopping transport. Therefore, the all-solid-state Li-Li symmetric cell with BC-PEO/LiTFSI (containing 3% BC) showed excellent electrochemical cycling properties over 1000 h at a current density of 0.5 mA cm^-2. Furthermore, the Li-LiFePO₄ full cell showed steady cycling performance under 3 mg cm^-2 areal loading at a current of 0.1 C, and the resultant Li-S full cell maintained over 610 mAh g^-1 for upward of 300 cycles at 0.2 C and 60 °C.