Scalable submicron/micron silicon particles stabilized in a robust graphite-carbon architecture for enhanced lithium storage

Tiansheng Mu; Zhiguo Zhang; Qin Li; Shuaifeng Lou; Pengjian Zuo; Chunyu Du; Geping Yin

doi:10.1016/j.jcis.2019.07.110

Scalable submicron/micron silicon particles stabilized in a robust graphite-carbon architecture for enhanced lithium storage

J Colloid Interface Sci. 2019 Nov 1:555:783-790. doi: 10.1016/j.jcis.2019.07.110. Epub 2019 Aug 1.

Authors

Tiansheng Mu¹, Zhiguo Zhang², Qin Li², Shuaifeng Lou², Pengjian Zuo², Chunyu Du², Geping Yin³

Affiliations

¹ State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
² MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
³ State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China. Electronic address: yingeping@hit.edu.cn.

PMID: 31425916
DOI: 10.1016/j.jcis.2019.07.110

Abstract

Silicon-carbon composite is recognized as one of the most promising next-generation anodes for high-energy lithium-ion batteries, especially silicon-graphite composites. Herein, cost-efficient and scalable submicron/micron silicon particles are stabilized in a robust graphite-carbon architecture by solid-phase ball milling and liquid-phase coating methods. The obtained silicon-graphite-carbon composite with a stable encapsulated sandwich-like architecture exhibits impressive lithium storage performance, including high initial Coulombic efficiency of 83.7%, outstanding cycle stability and remarkable rate capability. Even at high loadings of 4 mg cm^-2, it still exhibits great reversible capacity with 620 mA h g^-1 after 100 cycles at 0.2 C. Furthermore, 8 wt% silicon-graphite-carbon composites as additives are applied into the full cell with a designed capacity of 1000 mA h, and the full cell displays superior cycle stability with high capacity retention of 85% after 100 cycles. In addition, the scalable and low-cost preparation makes it enormous application value and huge commercial prospect.

Keywords: Full cell; High loading; Scalable; Submicron/micron silicon particles.