Self-assembled tio2-graphene hybrid nanostructures for enhanced Li-ion insertion

Donghai Wang; Daiwon Choi; Juan Li; Zhenguo Yang; Zimin Nie; Rong Kou; Dehong Hu; Chongmin Wang; Laxmikant V. Saraf; Jiguang Zhang; Ilhan A. Aksay; Jun Liu

doi:10.1021/nn900150y

Self-assembled tio2-graphene hybrid nanostructures for enhanced Li-ion insertion

Donghai Wang, Daiwon Choi, Juan Li, Zhenguo Yang, Zimin Nie, Rong Kou, Dehong Hu, Chongmin Wang, Laxmikant V. Saraf, Jiguang Zhang, Ilhan A. Aksay, Jun Liu

Research output: Contribution to journal › Article › peer-review

1665 Scopus citations

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)
Pages (from-to)	907-914
Number of pages	8
Journal	ACS nano
Volume	3
Issue number	4
DOIs	https://doi.org/10.1021/nn900150y
State	Published - Apr 28 2009

All Science Journal Classification (ASJC) codes

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/nn900150y

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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.",

author = "Donghai Wang and Daiwon Choi and Juan Li and Zhenguo Yang and Zimin Nie and Rong Kou and Dehong Hu and Chongmin Wang and Saraf, {Laxmikant V.} and Jiguang Zhang and Aksay, {Ilhan A.} and Jun Liu",

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T1 - Self-assembled tio2-graphene hybrid nanostructures for enhanced Li-ion insertion

AU - Wang, Donghai

AU - Choi, Daiwon

AU - Li, Juan

AU - Yang, Zhenguo

AU - Nie, Zimin

AU - Kou, Rong

AU - Hu, Dehong

AU - Wang, Chongmin

AU - Saraf, Laxmikant V.

AU - Zhang, Jiguang

AU - Aksay, Ilhan A.

AU - Liu, Jun

PY - 2009/4/28

Y1 - 2009/4/28

N2 - 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.

AB - 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.

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Self-assembled tio2-graphene hybrid nanostructures for enhanced Li-ion insertion

Abstract

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