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1D Sub‐Nanotubes with Anatase/Bronze TiO 2 Nanocrystal Wall for High‐Rate and Long‐Life Sodium‐Ion Batteries
Author(s) -
Chen Biao,
Meng Yuhuan,
Xie Fangxi,
He Fang,
He Chunnian,
Davey Kenneth,
Zhao Naiqin,
Qiao ShiZhang
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201804116
Subject(s) - anatase , materials science , nanocrystal , nanostructure , nanotechnology , chemical engineering , anode , rutile , fabrication , ion , electrode , catalysis , photocatalysis , chemistry , medicine , biochemistry , alternative medicine , physics , pathology , quantum mechanics , engineering
The development of 1D nanostructures with enhanced material properties has been an attractive endeavor for applications in energy and environmental fields, but it remains a major research challenge. Herein, this work demonstrates a simple, gel‐derived method to synthesize uniform 1D elongated sub‐nanotubes with an anatase/bronze TiO 2 nanocrystal wall (TiO 2 SNTs). The transformation mechanism of TiO 2 SNTs is studied by various ex situ characterization techniques. The resulting 1D nanostructures exhibit, synchronously, a high aspect ratio, open tubular interior, and anatase/bronze nanocrystal TiO 2 wall. This results in excellent properties of electron/ion transport and reaction kinetics. Consequently, as an anode material for sodium‐ion batteries (SIBs), the TiO 2 SNTs display an ultrastable long‐life cycling stability with a capacity of 107 mAh g −1 at 16 C after 4000 cycles and a high‐rate capacity of 94 mAh g −1 at 32 C. This a high‐rate and long‐life performance is superior to any report on pure TiO 2 for SIBs. This work provides new fundamental information for the design and fabrication of inorganic structures for energy and environmental applications.