An elastic carbon layer on echeveria-inspired SnO<inf>2</inf> anode for long-cycle and high-rate lithium ion batteries

A. Young Kim, Jung Sub Kim, Chairul Hudaya, Dongdong Xiao, Dong Jin Byun, Lin Gu, Xiao Wei, Yuan Yao, Richeng Yu, Joong Kee Lee

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The commercialization of Sn-based anodes for lithium ion batteries is still hindered due to the inherent volume change leading to a rapid capacity fading during the electrochemical cycle. Inspired by echeveria, a plant that stores sufficient water in its hierarchical leaves to survive in a drought, we report a breakthrough by designing the hierarchical and nanoporous SnO<inf>2</inf> electrode encapsulated with ultrathin carbon layer (∼2 nm). As evidently captured by in situ transmission electron microscopy, the conformal carbon coating on the surface of anode may provide an elastic cover that suppresses the cracks due to severe volume change, and increases both electrical and ionic conductivity, allowing the cells to exhibit excellent lithium storage performance with more than 800 cycles even with relatively high-rate of current densities.

Original languageEnglish
Pages (from-to)539-547
Number of pages9
JournalCarbon
Volume94
DOIs
Publication statusPublished - 2015 Aug 29

ASJC Scopus subject areas

  • Chemistry(all)

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