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Sandwich‐Like, Graphene‐Based Titania Nanosheets with High Surface Area for Fast Lithium Storage
Author(s) -
Yang Shubin,
Feng Xinliang,
Müllen Klaus
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201101599
Subject(s) - materials science , graphene , anode , nanosheet , mesoporous material , lithium (medication) , electrolyte , nanotechnology , electrode , current collector , diffusion barrier , conductivity , chemical engineering , layer (electronics) , catalysis , medicine , biochemistry , chemistry , endocrinology , engineering
Sandwich‐like, graphene‐based mesoporous titania (G‐TiO 2 ) nanosheets possess thin thickness, large aspect ratio, and mesoporous structure and show enhanced electrical conductivity. Such unique features provide numerous open channels for the access of electrolyte and facilitate the fast diffusion of lithium ions during the cycling processes. The graphene layer within each nanosheet can act as a mini‐current collector, which is favorable for the fast electron transport in the electrode. As a consequence, G‐TiO 2 nanosheets exhibit a ultrahigh rate capability and excellent cycle performance, holding great potential as a high‐rate anode material for lithium storage.