ja4100723_si_001.pdf (4.26 MB)
Sol–Gel Design Strategy for Ultradispersed TiO2 Nanoparticles on Graphene for High-Performance Lithium Ion Batteries
journal contribution
posted on 2013-12-11, 00:00 authored by Wei Li, Fei Wang, Shanshan Feng, Jinxiu Wang, Zhenkun Sun, Bin Li, Yuhui Li, Jianping Yang, Ahmed
A. Elzatahry, Yongyao Xia, Dongyuan ZhaoThe
rational design and controllable synthesis of strongly coupled
inorganic/graphene hybrids represents a long-standing challenge for
developing advanced catalysts and energy-storage materials. Here,
we report a simple sol–gel method toward creating ultradispersed
TiO2 nanoparticles on graphene with an unprecedented degree
of control based on the precise separation and manipulation of nanoparticles
nucleated, grown, anchored, and crystallized and the reduction of
graphene oxide (GO). The hybrid materials show ultradispersed anatase
nanoparticles (∼5 nm), ultrathin thickness (≤3 layers),
and a high surface area of ∼229 m2/g and exhibit
a high specific capacity of ∼94 mA h g–1 at
∼59 C, which is twice as that of mechanically mixed composites
(∼41 mA h g–1), demonstrating the potential
of strongly synergistic coupling effects for advanced functional systems.