A critical SiOx layer on Si porous structures to construct highly-reversible anode materials for lithium-ion batteries

Yifan Chen; Yangfan Lin; Ning Du; Yaguang Zhang; Hui Zhang; Deren Yang

doi:10.1039/c7cc02732j

A critical SiO_x layer on Si porous structures to construct highly-reversible anode materials for lithium-ion batteries

Chem Commun (Camb). 2017 Jun 1;53(45):6101-6104. doi: 10.1039/c7cc02732j.

Authors

Yifan Chen¹, Yangfan Lin, Ning Du, Yaguang Zhang, Hui Zhang, Deren Yang

Affiliation

¹ State Key Laboratory of Silicon Materials, School of Materials Science & Engineering, Cyrus Tang Center for Sensor Materials and Applications Zhejiang University, Hangzhou, Zhejiang 310027, People's Republic of China. msezhanghui@zju.edu.cn.

PMID: 28530284
DOI: 10.1039/c7cc02732j

Abstract

A novel Si/SiO_x porous structure with a SiO_x coating layer of varying thicknesses was prepared via a simple annealing and acid washing process. When used as an anode material for lithium-ion batteries, the Si/SiO_x porous structure with an ∼9 nm SiO_x coating layer demonstrates significantly improved electrochemical performance with a high reversible discharge capacity of over 915 mA h g^-1 after 500 long cycles at 1 A g^-1. The lithiation mechanism of a SiO_x layer of different thicknesses has also been investigated.