A highly stable pre-lithiated SiOx anode coated with a "salt-in-polymer" layer

He Tian; Yu-Ming Zhao; Yi-Fan Tian; Ge Li; Jin-Yi Li; Ke-Cheng Jiang; Wen-Peng Wang; Xiao-Dong Li; Xu-Sheng Zhang; Quan Xu; Hong-Liang Li; Yu-Guo Guo

doi:10.1039/d2cc02605h

A highly stable pre-lithiated SiO_x anode coated with a "salt-in-polymer" layer

Chem Commun (Camb). 2022 Jul 14;58(57):7920-7923. doi: 10.1039/d2cc02605h.

Authors

He Tian¹, Yu-Ming Zhao², Yi-Fan Tian^{2

3}, Ge Li⁴, Jin-Yi Li⁴, Ke-Cheng Jiang⁵, Wen-Peng Wang², Xiao-Dong Li¹, Xu-Sheng Zhang^{2

3}, Quan Xu^{2

4}, Hong-Liang Li¹, Yu-Guo Guo^{2

3}

Affiliations

¹ College of Materials Science and Engineering, State Key Laboratory of Biopolysaccharide Fiber Forming and Eco-Textile, Qingdao University, Qingdao, 266071, P. R. China. lhl@qdu.edu.cn.
² CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China. xuquan@iccas.ac.cn.
³ University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
⁴ Beijing IAmetal New Energy Technology Co., Ltd, Beijing, 100190, P. R. China.
⁵ Dongguan Zenergy Battery Technologies Co., Ltd, Dongguan, 523000, P. R. China.

PMID: 35758402
DOI: 10.1039/d2cc02605h

Abstract

An artificial "salt-in-polymer" SEI, composed of poly-(1,3-dioxolane) and high-modulus fluorinated products generated from the in situ decomposition of Li salts, was constructed on the surface of Li-MSiO_x particles. This LiF-rich SEI helps to maintain the structural integrity of Li-MSiO_x particles and improves the Li storage reversibility of the Li-MSiO_x anode.