TiO2 Microboxes with Controlled Internal Porosity for High-Performance Lithium Storage

Xuehui Gao; Gaoran Li; Yangyang Xu; Zhanglian Hong; Chengdu Liang; Zhan Lin

doi:10.1002/anie.201506357

TiO2 Microboxes with Controlled Internal Porosity for High-Performance Lithium Storage

Angew Chem Int Ed Engl. 2015 Nov 23;54(48):14331-5. doi: 10.1002/anie.201506357. Epub 2015 Oct 2.

Authors

Xuehui Gao^{1

2}, Gaoran Li¹, Yangyang Xu¹, Zhanglian Hong², Chengdu Liang³, Zhan Lin⁴

Affiliations

¹ Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027 (P.R. China).
² State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (P.R. China).
³ Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (USA). liangcn@ornl.gov.
⁴ Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027 (P.R. China). zhanlin@zju.edu.cn.

PMID: 26429596
DOI: 10.1002/anie.201506357

Abstract

Titanium dioxide (TiO2) is considered a promising anode material for high-power lithium ion batteries (LIBs) because of its low cost, high thermal/chemical stability, and good safety performance without solid electrolyte interface formation. However, the poor electronic conductivity and low lithium ion diffusivity of TiO2 result in poor cyclability and lithium ion depletion at high current rates, which hinder them from practical applications. Herein we demonstrate that hierarchically structured TiO2 microboxes with controlled internal porosity can address the aforementioned problems for high-power, long-life LIB anodes. A self-templating method for the synthesis of mesoporous microboxes was developed through Na2 EDTA-assisted ion exchange of CaTiO3 microcubes. The resulting TiO2 nanorods were organized into microboxes that resemble the microcube precursors. This nanostructured TiO2 material has superior lithium storage properties with a capacity of 187 mAh g(-1) after 300 cycles at 1 C and good rate capabilities up to 20 C.

Keywords: TiO2; battery; hydrothermal; lithium ion; microbox.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.