Self-Assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-Ion Insertion

Citation:

Wang, D. H. ; Choi, D. W. ; Li, J. ; Yang, Z. G. ; Nie, Z. M. ; Kou, R. ; Hu, D. H. ; Wang, C. M. ; Saraf, L. V. ; Zhang, J. G. ; et al. Self-Assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-Ion Insertion. ACS Nano 2009, 3 907-914.

Date Published:

Apr

Type of Article:

Article

ISBN Number:

1936-0851

Accession Number:

WOS:000265618700023

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.