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ACS Nano. 2009 Apr 28;3(4):907-14. doi: 10.1021/nn900150y.

Self-assembled TiO2-graphene hybrid nanostructures for enhanced Li-ion insertion.

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  • 1Pacific Northwest National Laboratory, Richland, Washington 99352, USA.

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 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.

PMID:
19323486
DOI:
10.1021/nn900150y
[PubMed]
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