In situ synthesis of MOF-derived carbon shells for silicon anode with improved lithium-ion storage

Runsheng Gao, Jie Tang, Xiaoliang Yu, Shuai Tang, Kiyoshi Ozawa, Taizo Sasaki, Lu Chang Qin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

Silicon (Si) has been broadly investigated as a promising anode in lithium-ion batteries (LIBs). However, there is still a problem that the alloying reactions of Si and Li often cause structural failures and rapid degradation in capacity of the electrode. Herein, an in-situ encapsulation of Si nanoparticles forming metal-organic-framework (MOF) derived carbon shells has been developed to improve the performance and retain the structural integrity of the electrode. Using this strategy, a compact and robust interface was ensured between the Si nanoparticles and carbon shell while also reducing the unnecessary exposing areas simultaneously. Moreover, the pores in the MOF-derived carbon shells offered good channels for Li-ion penetration and diffusion. The resulted composite electrode exhibited excellent electrochemical performance and delivered a capacity of 3714 mAh g−1 at 200 mA g−1, and an outstanding reversible capacity of 820 mAh g−1 at 5000 mA g−1 even after 1000 cycles, Direct comparison between the encapsulated Si and naked Si revealed the significance of the MOF-derived carbon shells and its great potential for the next-generation high capacity LIBs.

Original languageEnglish
Article number104444
JournalNano Energy
Volume70
DOIs
Publication statusPublished - Apr 2020
Externally publishedYes

Keywords

  • Electrochemical properties
  • In-situ growth
  • Lithium-ion batteries
  • Metal-organic-framework
  • Silicon anode

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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