title: Nano-sized Ni-doped carbon aerogel for supercapacitor.
abstract: Carbon aerogel was prepared by polycondensation of resorcinol with formaldehyde using sodium carbonate as a catalyst in ambient conditions. Nano-sized Ni-doped carbon aerogel was then prepared by a precipitation method in an ethanol solvent. In order to elucidate the effect of nickel content on electrochemical properties, Ni-doped carbon aerogels (21, 35, 60, and 82 wt%) were prepared and their performance for supercapacitor electrode was investigated. Electrochemical properties of Ni-doped carbon aerogel electrodes were measured by cyclic voltammetry at a scan rate of 10 mV/sec and charge/discharge test at constant current of 1 A/g in 6 M KOH electrolyte. Among the samples prepared, 35 wt% Ni-doped carbon aerogel (Ni/CA-35) showed the highest capacitance (110 F/g) and excellent charge/discharge behavior. The enhanced capacitance of Ni-doped carbon aerogel was attributed to the faradaic redox reactions of nano-sized nickel oxide. Moreover, Ni-doped carbon aerogel exhibited quite stable cyclability, indicating long-term electrochemical stability.
authors: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul 151-744, Korea.
authors: Yoon Jae
authors: YJ
authors: Lee
authors: Ji Chul
authors: JC
authors: Jung
authors: Sunyoung
authors: S
authors: Park
authors: Jeong Gil
authors: JG
authors: Seo
authors: Sung-Hyeon
authors: SH
authors: Baeck
authors: Jung Rag
authors: JR
authors: Yoon
authors: Jongheop
authors: J
authors: Yi
authors: In Kyu
authors: IK
authors: Song
mesh_terms: D002244:Carbon / Q000737:chemistry*; D025802:Electric Capacitance; D005782:Gels / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D016062:Porosity; D012118:Resorcinols / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D005782:Gels; D012118:Resorcinols; D002244:Carbon; D009532:Nickel; C031389:resorcinol