Issue 17, 2022

Preparation and controllable prelithiation of core–shell SnOx@C composites for high-performance lithium-ion batteries

Abstract

SnOx is an attractive anode material for lithium-ion batteries (LIBs) with high-energy density. However, large volume variation during lithiation/delithiation leads to its rapid capacity decay. Simultaneously, a low initial coulombic efficiency (ICE) also severely limits its commercial application. Therefore, carbon coated SnOx (SnOx@C) with adjustable composition and coating thickness was firstly prepared to improve cycling stability through a phenolic resin condensation polymerization–pyrolysis method. The as-prepared SnOx@C anode exhibited the best electrochemical performance with a capacity retention of 94.1% after 300 cycles at 1 A g−1. To overcome the large irreversible capacity loss during the first cycle, SnOx@C plates were immersed in the lithium-4,4′-dimethylbiphenyl reagent for different periods of time, and the ICE of SnOx@C was increased from 64.3% to 224.86% for 20 min of immersion. The full-cell based on the SnOx@C anode and commercial LiFePO4 cathode not only presented good cycling stability with a high capacity of 98.05 mAh g−1 at 2C after 80 cycles but also showed satisfactory rate performance.

Graphical abstract: Preparation and controllable prelithiation of core–shell SnOx@C composites for high-performance lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
29 Nov 2021
Accepted
17 Mar 2022
First published
05 Apr 2022

CrystEngComm, 2022,24, 3189-3198

Preparation and controllable prelithiation of core–shell SnOx@C composites for high-performance lithium-ion batteries

C. Ma, B. Wang, T. Zhang, F. Jin, Y. Lu, Y. Chen, Z. Ren, Z. Jia, C. Zheng, J. Fang, J. Li and D. Wang, CrystEngComm, 2022, 24, 3189 DOI: 10.1039/D1CE01588E

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