Grain Boundaries Enriched Hierarchically Mesoporous MnO/Carbon Microspheres for Superior Lithium Ion Battery Anode

Shao Zhuan Huang, Qian Zhang, Wenbei Yu, Xiao Yu Yang, Chao Wang, Yu Li, Bao Lian Su

Research output: Contribution to journalArticle

Abstract

To develop high-performance anode materials of lithium ion batteries (LIBs) for practical high energy application, a grain boundaries enriched hierarchically mesoporous MnO/C microsphere composite has been fabricated by an in-situ carbonization process. The mesoporous MnO/C microsphere is constructed by abundant grains and grain boundaries that are uniformly embedded in a carbon matrix. Such unique nanoarchitecture exhibits high tap density and structural stability, and provides 3D continuous transport pathways for electrons and Li-ions, enabling high electrochemical stability and improved lithium storage kinetics. As a consequence, the mesoporous MnO/C electrode delivers ever-increasing specific capacity (1200 mAh g−1 after 100 cycles at 100 mA g−1) and excellent rate capability (588 mAh g−1 at 2 A g−1). Such superior lithium storage performance suggests that the hierarchically mesoporous MnO/C microsphere electrode should be one of the most promising anode materials for electric vehicle and grid energy storage application.

Original languageEnglish
Pages (from-to)561-569
Number of pages9
JournalElectrochimica Acta
Volume222
DOIs
Publication statusPublished - 20 Dec 2016

Keywords

  • grain boundary
  • hierarchically mesoporous microsphere
  • In-situ carbonization
  • lithium ion battery
  • MnO/C composite

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