期刊
ACS NANO
卷 3, 期 4, 页码 907-914出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn900150y
关键词
graphene; metal oxide; hybrid nanostructure; Li-ion; battery
类别
资金
- Battelle Memorial Institute for the Department of Energy [DE-AC05-76RL01830]
- DARPA and ARO/MURI [W911NF-04-1-0170]
We used anionic sulfate surfactants to assist the stabilization of graphene in aqueous solutions and facilitate the self-assembly of in situ grown nanocrystalline TiO2, rutile and anatase, with graphene. These nanostructured TiO2-graphene hybrid materials were used for investigation of Li-ion insertion properties. The hybrid materials showed significantly enhanced Li-ion insertion/extraction in TiO2. The specific capacity was more than doubled at high charge rates, as compared with the pure TiO2 phase. The improved capacity at high charge-discharge rate may be attributed to increased electrode conductivity in the presence of a percolated graphene network embedded into the metal oxide electrodes.
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