Phosphorus‐modulation‐triggered surface disorder in titanium dioxide nanocrystals enables exceptional sodium‐storage performance

Qingbing Xia, Yang Huang, Jin Xiao, Lei Wang*, Zeheng Lin, Weijie Li, Hui Liu*, Qinfen Gu, Hua Kun Liu, Shu-Lei Chou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

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 TiO2. It is found that the P-modulated TiO2 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.
Original languageEnglish
Pages (from-to)4022–4026
Number of pages5
JournalAngewandte Chemie - International Edition
Volume58
Issue number12
Early online date24 Jan 2019
DOIs
Publication statusPublished - 18 Mar 2019
Externally publishedYes

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