Improved rate capability of Si-C composite anodes by boron doping for lithium-ion batteries

Ran Yi, Jiantao Zai, Fang Dai, Mikhail L. Gordin, Donghai Wang

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

We report a novel strategy to enhance the rate capability of Si-C composite by facile boron doping. Boron doping was confirmed by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The boron-doped Si-C composite shows much improved rate capability, delivering a capacity of 575 mAh/g at 6.4 A/g without any external carbon additive, 80% higher than that of undoped composite. Electrochemical impedance spectroscopy (EIS) measurement shows that boron-doped Si-C composite has lower charge transfer resistance, which helps improve its rate capability.

Original languageEnglish (US)
Pages (from-to)29-32
Number of pages4
JournalElectrochemistry Communications
Volume36
DOIs
StatePublished - Oct 1 2013

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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