Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 1, Pages 99-103Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am1009887
Keywords
alpha-Co(OH)(2); long nanowire arrays; robust adhesion; graphite subrate; supercapacitor; sacrificial template
Funding
- National Natural Science Foundation of China [50872039, 50802032]
- China Postdoctoral Science Foundation [20090460996]
- Huazhong Normal University
- Huazhong Normal University) Ministry of Education, China [QL-PL200902]
- MOE [CCNU09A01019]
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Large-scale uniform alpha-Co(OH)(2) nanowire arrays (NWAs) with an average length of similar to 20 mu m grown on pyrolytic graphite (PG) were successfully synthesized by a hydrothermal method at 120 degrees C Ultrasonication test was carried out toward the as made nanoarray products and the result demonstrated their robust adhesion to graphtic substrate. Afte 300,s of sonication testing alpha-Co(OH)(2) NWAs could still possess both integrated one-dimensional (1 D) nanoarray architecture and good electronic connections with current collector. When investigated as electrochemical pseudocapacitor electrodes, alpha-Co(OH)(2) NWAs exhibited good energy-storage performance in terms of high specific capacitance of 642.5 F/g, good rate capability and excellent capacity retention. Our work not only presents a cost-effective and scale-up synthetic-method for alpha-Co(OH)(2) NWAs bu also holds promise in general synthesis of long arrays of other metal hydroxides/oxide (TiO2, Fe2O3,SnO2 etc) nanostructures on PG substrate by using alpha-Co(OH)(2) NWAs as sacrificial templates.
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