Single-walled Carbon Nanotubes as Electrode Materials for Supercapacitors

✍ Scribed by Bin Xu; Feng Wu; Fang Wang; Shi Chen; Gao-Ping Cao; Yu-Sheng Yang

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 52 KB
• Volume: 24
• Category: Article
• ISSN: 0256-7660
• DOI: 10.1002/cjoc.200690284

✦ Synopsis

Abstract

Large‐scale synthesized single‐walled carbon nanotubes (SWNT) prepared by electric arc discharge method and a mixture of NiO and Y~2~O~3~ as catalyst have been used as electrode materials for supercapacitors. N~2~ adsorption/desorption measurement shows that the SWNT is a microporous and mesoporous material with specific surface area 435 m^2^·g^−1^. The specific capacitance of the nitric acid treated SWNT in aqueous electrolyte reaches as high as 105 F/g, which is a combination of electric double layer capacitance and pseudocapacitance. The SWNT‐based capacitors also have good charge/discharge reversibility and cycling perdurability.