Co3O4 Nanosheets with In-Plane Pores and Highly Active {112} Exposed Facets for High Performance Lithium Storage

Renjie Wei, Xianlong Zhou, Tengfei Zhou, Juncheng Hu, Johnny C. Ho

研究成果: Contribution to journalArticle査読

22 被引用数 (Scopus)

抄録

Recently, two-dimensional transition metal oxide nanomaterials have been extensively investigated as promising candidates for the lithium-ion battery anode materials due to their elastic volume change, efficient ion/electrical pathways, and additional interfacial lithium storage sites. Herein, we report a simple wet-chemical method followed by thermal treatment to synthesize Co3O4 nanosheets with the in-plane pores. The as-prepared nanosheets are found to selectively expose the highly active {112} facets as the dominant surfaces. When fabricated into the anode configuration, a specific capacity of 1717 mA h g-1 can be reliably retained after 100 cycles at a current density of 200 mA g-1. While increasing the current density to 1 A g-1 and prolonging the cycle life to 400 cycles, the nanosheets can still deliver a capacity of 1090 mA h g-1 with a Coulombic efficiency of 99.5%. This excellent electrochemical performance can be attributed to the unique morphological structures of our porous nanosheets for the shortened lithium ion diffusion pathway, alleviated volume expansion, and enhanced active sites, indicating the technological potency of the nanosheets for high-performance lithium storage. (Graph Presented).

本文言語英語
ページ(範囲)19002-19009
ページ数8
ジャーナルJournal of Physical Chemistry C
121
35
DOI
出版ステータス出版済み - 9 7 2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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