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Phosphorus‐Modulation‐Triggered Surface Disorder in Titanium Dioxide Nanocrystals Enables Exceptional Sodium‐Storage Performance
Author(s) -
Xia Qingbing,
Huang Yang,
Xiao Jin,
Wang Lei,
Lin Zeheng,
Li Weijie,
Liu Hui,
Gu Qinfen,
Liu Hua Kun,
Chou ShuLei
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201813721
Subject(s) - kinetics , nanocrystal , titanium dioxide , materials science , electrochemistry , chemical engineering , phosphorus , chemistry , nanotechnology , electrode , composite material , metallurgy , physics , quantum mechanics , engineering
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.