以KOH作沉淀剂制备掺杂Al(Ⅲ)的Co3O4粉体.X射线衍射显示,掺Al的Co3O4不改变其晶型结构.循环伏安、恒流充放电等测试表明,化学掺Al后的Co3O4电极,其比容量提高,当Co(Ⅱ)与Al(Ⅲ)的摩尔比为1∶0.05时,在0~400 mV的电位区间内,5 mA/cm2电流密度下,单电极放电比容量可达518.07 F/g.
With KOH as precipitator to prepare Aluminum doped Co3O4,X-ray diffraction indicated that the doping Al did not change the crystal structure of Co3O4.Electrochemical properties of the sample were tested by cyclic voltammetry and constant-current charge/discharge.The results showed that the chemical doping improved the specific capacitance.When the mol ratio of Co(Ⅱ) with Al(Ⅲ)was 1∶0.05,the specific capacitance was up to 518.07 F/g within 0～400 mV potenitial at current density 5 mA/cm2.
[1]Conway B E.Transition from“supercapacitor"to"bat-tery"behavior in electrochemical energy storage[J].Proceedings of the International Power Sources Symposi-um,1991,138(6):319-327.
[2]Kang Y M,Kim K Y,Kim J H.Electrochemical prop-erties of Co3O4,Ni-Co3O4mixture and Ni-Co3O4com-posite as anode materials for Li ion secondary batteries[J].Journal of Power Sources,2004,133:252-259.
[3]Cai Zhenping(蔡振平).Synthesis and electrochemicalperformance of Co3O4as negative electrode materials forlithium-ion batteries[J].Journal of Power Sources,2003,27(4):370-372.
[4]Kyung-Wang Nam,Won-Sub Yoon,Kwang-Bim Kim.X ray absorption spectroscopy studies of nickel oxidethin film electrodes for supercapacitors[J].Elecro-echemica Acta,2002,47(19):3201-3209.
[5]Wang Xingyan(汪形艳),Wang Xianyou(王先友),Yang Hongping(杨红平),et al.Studies on preparationand electrochemical electrode marerials[J].NaturalScience Journal of Xiangtan University(in Chinese),2004,26(3):87-90.
[6]Andrew Burke.Ultracapacitors:why,how,and whereis the technology[J].Journal of Power Sources,2000,91(1):37-50.
[7]Svegl F,Orel B,Hutchine M G,et al.Structural andspectroelectrochemical investigations of sol-gel derivedelectrochromic spinel Co3O4films[J].Journal of Elec-trochemical Society,1996,143(5):1532-1539.
[8]Yuan Aabao(袁安保),Zhang Jianqing(张鉴清),CaoChunan(曹楚南).Research progress of nickel hydrox-ide electrodes[J].Journal of Power Sources,2001,(1):53-59.
[9]Yu Weiping(于维平),Meng Lingkuan(孟令款),Yang Xiaoping(杨晓萍),et al.CoO-doped NiO pre-pared by chemical method and its capacitance perform-ance[J].Heat Treatment of Metals,2005,30(9):23-26.
[10]Chen J,Bradhurst D H,Dou S X,et al.Nickel hy-droxide as an active material for the positive electrodein recharge-able alkaline batteries[J].Journal ofElectrochemical Society,1999,146(10):3606-3612.
[11]Xu Juan(许娟),Zhou Yiming(周益明),Tang Ya-wen(唐亚文),et al.Solid state synthesis and electro-chemical performances ofα-Ni(OH)2including 20%Al[J].Chinese Journal of Inorganic Chemistry,2003,19(5):535-538.
