Title

Phosphorus‐Modulation‐Triggered Surface Disorder in Titanium Dioxide Nanocrystals Enables Exceptional Sodium‐Storage Performance

RIS ID

133604

Publication Details

Xia, Q., Huang, Y., Xiao, J., Wang, L., Lin, Z., Li, W., Liu, H., Gu, Q., Liu, H. Kun. & Chou, S. (2019). Phosphorus‐Modulation‐Triggered Surface Disorder in Titanium Dioxide Nanocrystals Enables Exceptional Sodium‐Storage Performance. Angewandte Chemie - International Edition, 58 (12), 4022-4026.

Abstract

Structural modulation and surface engineering have remarkable advantages for fast and efficient charge storage. Herein, we present a phosphorus modulation strategy which simultaneously realizes surface structural disorder with interior atomic-level P-doping to boost the Na + storage kinetics of TiO 2 . It is found that the P-modulated TiO 2 nanocrystals exhibit a favourable electronic structure, and enhanced structural stability, Na + transfer kinetics, as well as surface electrochemical reactivity, resulting in a genuine zero-strain characteristic with only approximately 0.1 % volume variation during Na + insertion/extraction, and exceptional Na + storage performance including an ultrahigh rate capability of 210 mAh g −1 at 50 C and a strong long-term cycling stability without significant capacity decay up to 5000 cycles at 30 C.

Grant Number

ARC/DE180101478

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