Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion Insertion

Journal Article · Wed Apr 01 00:00:00 EDT 2009 · ACS Nano, 3(4):907-914

DOI:https://doi.org/10.1021/nn900150y· OSTI ID:958481

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

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 presence of a percolated graphene network embedded into the metal oxide electrodes.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 958481
• Report Number(s): PNNL-SA-64760; 25593; 25622; 30490; TRN: US201002%%53
• Journal Information: ACS Nano, 3(4):907-914, Vol. 3, Issue 4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
25 ENERGY STORAGE
77 NANOSCIENCE AND NANOTECHNOLOGY
TITANIUM OXIDES
GRAPHITE
NANOSTRUCTURES
LITHIUM
METAL-NONMETAL BATTERIES
ELECTRIC CONDUCTIVITY
ELECTRODES
STABILIZATION
Graphene
metal oxide
hybrid nanostructure
Li-ion
battery
Environmental Molecular Sciences Laboratory