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Hydrogenated dual-shell sodium titanate cubes for sodium-ion batteries with optimized ion transportation†
Fangxi Xie,Lei Zhang,Yan Jiao,Anthony Vasileff,Dongliang Chao,Shi-Zhang Qiao
Journal of Materials Chemistry A Pub Date : 04/08/2020 00:00:00 , DOI:10.1039/D0TA00967A
Abstract

As a typical layered electrode material, sodium titanate has shown high energy density but poor ion transportation kinetics for sodium-ion batteries. Hence, optimizing the migration of larger ions in such a layered structured material is of great significance for sodium-ion batteries. Herein, we rationally construct dual-shell structured titanates with hydrogenated-induced oxygen vacancies to regulate the tunnels for Na ion transport structurally and atomically. Serving as anodes for batteries, the as-prepared samples exhibit enhanced rate performance compared to the one without oxygen vacancies. The result demonstrates an effective approach to optimize ion transport kinetics.

Graphical abstract: Hydrogenated dual-shell sodium titanate cubes for sodium-ion batteries with optimized ion transportation
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