High capacity lithium ion battery anodes of silicon and germanium

Timothy D. Bogart, Aaron Michael Chockla, Brian A. Korgel*

*Corresponding author for this work

Research output: Contribution to journalReview article

53 Scopus citations

Abstract

Lithium ion batteries with significantly higher energy and power density desired for new personal electronic devices, electric vehicles, and large-scale energy storage, require new materials. This review focuses on the replacement of the graphite anode with silicon or germanium. Si and Ge both have significantly higher Li storage capacities than graphite, but also undergo significant volumetric expansion and contraction during lithiation and delithiation. Si and Ge nanomaterials can tolerate these mechanical stresses, but solvent decomposition and loss of electrical contact with the current collector tend to lead to failure. Si and Ge anodes must therefore be formulated with appropriate binder, conductive carbon, and stabilizing additives in the electrolyte solvent to achieve stable cycling and high capacity, as described herein.

Original languageEnglish (US)
Pages (from-to)286-293
Number of pages8
JournalCurrent Opinion in Chemical Engineering
Volume2
Issue number3
DOIs
StatePublished - Aug 2013

ASJC Scopus subject areas

  • Energy(all)

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