Abstract
We used anionic sulfate surfactants to assist the stabilization of graphene in aqueous solutions and facilitate the self-assembly of in situ grown nanocrystalline TiO 2, rutile and anatase, with graphene. These nanostructured TiO 2-graphene hybrid materials were used for investigation of Li-ion insertion properties. The hybrid materials showed significantly enhanced Li-ion insertion/extraction in TiO 2. The specific capacity was more than doubled at high charge rates, as compared with the pure TiO 2 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.
Original language | English (US) |
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Pages (from-to) | 907-914 |
Number of pages | 8 |
Journal | ACS Nano |
Volume | 3 |
Issue number | 4 |
DOIs | |
State | Published - Apr 28 2009 |
All Science Journal Classification (ASJC) codes
- General Engineering
- General Materials Science
- General Physics and Astronomy
Keywords
- Battery
- Graphene
- Hybrid nanostructure
- Li-ion
- Metal oxide