Mesoporous SnO2 Nanostructures of Ultrahigh Surface Areas by Novel Anodization

被引:34
作者
Bian, Haidong [1 ,2 ]
Tian, Yaruan [1 ,3 ]
Lee, Chris [1 ,3 ]
Yuen, Muk-Fung [1 ,3 ]
Zhang, Wenjun [1 ,3 ]
Li, Yang Yang [1 ,3 ,4 ]
机构
[1] City Univ Hong Kong, COSDAF, Kowloon, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Dept Biol & Chem, 83 Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
[4] City Univ Hong Kong, Shenzhen Res Inst, 8 Yuexing First Rd,Shenzhen Hitech Ind Pk, Shenzhen, Peoples R China
关键词
anodization; tin oxalate; tin oxide; mesoporous structures; Li-ion batteries; supercapacitors; SENSITIZED SOLAR-CELLS; HIGH-PERFORMANCE SUPERCAPACITORS; NANOPOROUS TIN OXIDE; LITHIUM STORAGE; ION BATTERIES; GAS SENSOR; ELECTROCHEMICAL ANODIZATION; CONVERSION EFFICIENCY; ANODIC-OXIDATION; ANATASE TIO2;
D O I
10.1021/acsami.6b09795
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Here we report a novel type of hierarchical mesoporous SnO2 nanostructures 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 SnO2 nanostructures thus obtained feature highly porous nanosheets with mesoporous pores well below 10 nm, enabling a remarkably high surface area of 202.8 m(2)/g which represents one of the highest values reported to date on SnO2 nanostructures. The formation of this novel type of SnO2 nanostructures 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 SnO2 nanostructures indicate their promising applications as lithium-ion battery and supercapacitor electrode materials.
引用
收藏
页码:28862 / 28871
页数:10
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