Authors: Xia, QB; Huang, Y; Xiao, J; Wang, L; Lin, ZH; Li, WJ; Liu, H; Gu, QF; Liu, HK; Chou, SL
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume: 58 Issue: 12 Pages: 4022-4026 Published: MAR 18 2019 Language: English Document type: Article
DOI: 10.1002/anie.201813721
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.
全文链接：https://onlinelibrary.wiley.com/doi/10.1002/anie.201813721