Polymorphism-induced catalysis difference of TiO2 nanofibers for rechargeable Li–O2 batteries

Seung Ho Kang; Kyeongse Song; Jaepyeong Jung; Mi Ru Jo; Yong-Mook Kang

doi:10.1039/C4TA04046E

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Polymorphism-induced catalysis difference of TiO₂ nanofibers for rechargeable Li–O₂ batteries†

Seung Ho Kang,‡^a Kyeongse Song,‡^a Jaepyeong Jung,^a Mi Ru Jo^a and Yong-Mook Kang*^a

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* Corresponding authors

^a Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea
E-mail: dake1234@dongguk.edu

Abstract

The polymorphic change of TiO₂ nanofiber catalysts from anatase to rutile enabled Li–O₂ cells to have higher round-trip efficiency and lower overpotential followed by a better cyclic retention. This is due to enhanced catalytic activity probably associated with the smaller Li⁺ chemisorption energy and band gap of the rutile phase compared with the anatase phase.

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Article information

DOI: https://doi.org/10.1039/C4TA04046E
Article type: Paper
Submitted: 06 Aug 2014
Accepted: 08 Oct 2014
First published: 08 Oct 2014

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J. Mater. Chem. A, 2014,2, 19660-19664

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Polymorphism-induced catalysis difference of TiO₂ nanofibers for rechargeable Li–O₂ batteries

S. H. Kang, K. Song, J. Jung, M. R. Jo and Y. Kang, J. Mater. Chem. A, 2014, 2, 19660 DOI: 10.1039/C4TA04046E

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Journal of Materials Chemistry A