Jump to main content
Jump to site search

Issue 44, 2016
Previous Article Next Article

Black mesoporous Li4Ti5O12−δ nanowall arrays with improved rate performance as advanced 3D anodes for microbatteries

Author affiliations

Abstract

Binder-free and self-standing lithium titanate nanoarrays could be promising 3D anodes for lithium-ion microbatteries. The intrinsic poor electrical conductivity of Li4Ti5O12, however, spoils its rate performance and restrains its application in commercial batteries. In this work, black mesoporous Li4Ti5O12−δ nanowall arrays with oxygen vacancies are synthesized by a facile hydrothermal method with post heat treatment in an Ar atmosphere. The heat treatment in an inert atmosphere is effective for generating oxygen vacancies by forming Ti3+ ions in Li4Ti5O12−δ nanowall arrays, thus greatly enhancing the electron transfer in the spinel structure. Consequently, the black mesoporous Li4Ti5O12−δ nanowall arrays exhibit greatly improved electrode kinetics and rate performance compared to the stoichiometrical Li4Ti5O12 and Li4Ti5O12/TiO2 dual phase nanowall arrays. In specific, the black mesoporous Li4Ti5O12−δ nanowall arrays can deliver a large specific capacity of about 115 mA h g−1 at 20C as well as excellent cycling stability, making them promising as 3D anodes for advanced lithium-ion microbatteries.

Graphical abstract: Black mesoporous Li4Ti5O12−δ nanowall arrays with improved rate performance as advanced 3D anodes for microbatteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Aug 2016, accepted on 12 Oct 2016 and first published on 13 Oct 2016


Article type: Paper
DOI: 10.1039/C6TA06699B
Citation: J. Mater. Chem. A, 2016,4, 17543-17551
  •   Request permissions

    Black mesoporous Li4Ti5O12−δ nanowall arrays with improved rate performance as advanced 3D anodes for microbatteries

    Q. Xia, N. Jabeen, S. V. Savilov, S. M. Aldoshin and H. Xia, J. Mater. Chem. A, 2016, 4, 17543
    DOI: 10.1039/C6TA06699B

Search articles by author

Spotlight

Advertisements