Issue 25, 2021

3D-Assembled rutile TiO2 spheres with c-channels for efficient lithium-ion storage

Abstract

Three-dimensional (3D) TiO2 architectures have attracted significant attention recently as they can improve the electrochemical stability and realize the full potential of TiO2-based anodes in lithium ion batteries. Here, flower-like rutile TiO2 spheres with radially assembled nanorods (c-channels) were fabricated via a simple hydrothermal method. The 3D radial architecture affords massive active sites to fortify the lithium storage. Moreover, the presence of c-channels facilitates electrolyte infiltration and offers facile pathways for efficient Li+ transport. As a result, this flower-like rutile TiO2 anode gives significantly enhanced specific capacities (615 mA h g−1 at 1 C and 386 mA h g−1 at 2 C after 400 cycles) and a superior long-term cyclability (up to 10 000 cycles with a specific capacity of 67 mA h g−1 at 100 C). Kinetic analysis reveals that the enhanced diffusion-controlled and surface capacitive storage leads to the excellent electrochemical behavior. This work not only exhibits the enormous advantages of 3D architectures with c-channels, but also provides access to structural design and crystal phase selection for TiO2-based anode materials.

Graphical abstract: 3D-Assembled rutile TiO2 spheres with c-channels for efficient lithium-ion storage

Supplementary files

Article information

Article type
Paper
Submitted
02 Apr 2021
Accepted
04 Jun 2021
First published
04 Jun 2021

Nanoscale, 2021,13, 11104-11111

3D-Assembled rutile TiO2 spheres with c-channels for efficient lithium-ion storage

Z. Hao, M. Tian, Y. Ren, W. Dai, M. Wang, W. Chen and G. Q. Xu, Nanoscale, 2021, 13, 11104 DOI: 10.1039/D1NR02064A

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