title: Mesoporous SnO2Nanostructures of Ultrahigh Surface Areas by Novel Anodization.
abstract: Here we report a novel type of hierarchical mesoporous SnO2nanostructures fabricated by a facile anodization method in a novel electrolyte system (an ethylene glycol solution of H2C2O4/NH4F) followed by thermal annealing at a low temperature. The SnO2nanostructures thus obtained feature highly porous nanosheets with mesoporous pores well below 10 nm, enabling a remarkably high surface area of 202.8 m2/g which represents one of the highest values reported to date on SnO2nanostructures. The formation of this novel type of SnO2nanostructures is ascribed to an interesting self-assembly mechanism of the anodic tin oxalate, which was found to be heavily impacted by the anodization voltage and water content in the electrolyte. The electrochemical measurements of the mesoporous SnO2nanostructures indicate their promising applications as lithium-ion battery and supercapacitor electrode materials.
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Kowloon, Hong Kong, China.|Department of Biology and Chemistry, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong, China.
authors.forename: Haidong
authors.initials: H
authors.lastname: Bian
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Kowloon, Hong Kong, China.|Department of Physics and Materials Science, City University of Hong Kong , Kowloon, Hong Kong, China.
authors.forename: Yayuan
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Kowloon, Hong Kong, China.|Department of Physics and Materials Science, City University of Hong Kong , Kowloon, Hong Kong, China.
authors.forename: Chris
authors.initials: C
authors.lastname: Lee
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Kowloon, Hong Kong, China.|Department of Physics and Materials Science, City University of Hong Kong , Kowloon, Hong Kong, China.
authors.forename: Muk-Fung
authors.initials: MF
authors.lastname: Yuen
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Kowloon, Hong Kong, China.|Department of Physics and Materials Science, City University of Hong Kong , Kowloon, Hong Kong, China.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Kowloon, Hong Kong, China.|Department of Physics and Materials Science, City University of Hong Kong , Kowloon, Hong Kong, China.|City University of Hong Kong Shenzhen Research Institute , 8 Yuexing first Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China.
authors.forename: Yang Yang
authors.initials: YY
authors.lastname: Li
keywords: Li-ion batteries; anodization; mesoporous structures; supercapacitors; tin oxalate; tin oxide