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

Structural modulation and surface engineering have remarkable advantages for fast and efficient charge storage. Here, we present a phosphorus modulation strategy which simultaneously realizes surface structural‐disorder with interior atomic‐level P‐doping to boost 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, rustling a genuine zero‐strain characteristic with only ~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

from A via a.sfakia on Inoreader http://bit.ly/2AY6dWA