‘Isofacet’ anatase TiO2 microcages: topotactic synthesis and ultrastable Li-ion storage

Qili Wu, Xianfeng Yang, Wuzong Zhou, Qiong Gao , Fengqi Lu, Jianle Zhuang , Xianfang Xu, Mingmei Wu, Hong Jin Fan

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)
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Abstract

A new type of anatase TiO2 microcages assembled by oriented nanocrystals have been successfully fabricated through a topotactical conversion from CaTiO3 microcage precursor. The anatase microcages have all their six side faces dominated by anatase {001} facets, as revealed by detailed electron microscopy characterization. When used as the anode material for Li-ion storage, the unique microcages have the advantage of remarkable structural stability, high surface areas, and facile electronic conduction path. As a result, the TiO2 microcages-based anode achieves a high lithium storage performance especially at high current rates and long cycling stability, giving 175 mAh g-1 at 5C (850 mA g-1) after 800 cycles and 95 mAh g-1 at 50 C after 5000 cycles. Our comparison to the literature shows that this is a competitive and promising material for Li-ion battery and potentially also photocatalyst applications.

Original languageEnglish
Article number1500210
JournalAdvanced Materials Interfaces
Volume2
Issue number14
Early online date23 Jul 2015
DOIs
Publication statusPublished - 22 Sept 2015

Keywords

  • Isofacet
  • Lithium ion batteries
  • Microcages
  • Titanate
  • Topotactic synthesis

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