Preparation of nanocrystalline Co3O4 and its properties as supercapacitors

被引:9
作者
Cao, L [1 ]
Zhou, YK [1 ]
Lu, M [1 ]
Li, HL [1 ]
机构
[1] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China
来源
CHINESE SCIENCE BULLETIN | 2003年 / 48卷 / 12期
关键词
nanocrystallines Co3O4; preparation; electrochemical capacitors; supercapacitance; AC impedance;
D O I
10.1360/02wb0203
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Nanocrystallines Co3O4 with the particle diameter of 3 nm are prepared and tested as active electrode material for an electrochemical supercapacitor. The results of characterization indicate that the grain size of this material is very small; the specific surface area is very high (192 m(2)/g); the distributions of pore diameter are desirable and effective; furthermore, the agglomeration problem among small particles was solved to a certain extent. The electrochemical tests show that the electrode prepared with the Co3O4 exhibits distinct characteristic of capacitance and very high specific capacitance of 365-401 F/g. Additionally, the main attribute of capacitance, namely supercapacitance, was also testified.
引用
收藏
页码:1212 / 1215
页数:4
相关论文
共 11 条
[1]   Carbon nanotubes - the route toward applications [J].
Baughman, RH ;
Zakhidov, AA ;
de Heer, WA .
SCIENCE, 2002, 297 (5582) :787-792
[2]  
Conway B. E., 1999, ELECTROCHEMICAL SUPE, DOI DOI 10.1007/978-1-4757-3058-6
[3]  
CONWAY BE, 1991, J ELECTROCHEM SOC, V138, P1
[4]   Application of double-layer capacitor technology to static condensers for distribution system voltage control. [J].
Halpin, SM ;
Spyker, RL ;
Nelms, RM ;
Burch, RF .
IEEE TRANSACTIONS ON POWER SYSTEMS, 1996, 11 (04) :1899-1904
[5]   Characterization of sol-gel-derived cobalt oxide xerogels as electrochemical capacitors [J].
Lin, C ;
Ritter, JA ;
Popov, BN .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (12) :4097-4103
[6]   Porous nickel oxide/nickel films for electrochemical capacitors [J].
Liu, KC ;
Anderson, MA .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (01) :124-130
[7]  
Ma RZ, 2000, SCI CHINA TECHNOL SC, V30, P112
[8]   Deposition of ruthenium nanoparticles on carbon aerogels for high energy density supercapacitor electrodes [J].
Miller, JM ;
Dunn, B ;
Tran, TD ;
Pekala, RW .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (12) :L309-L311
[9]   Electrochemical efficiency in multiple discharge recharge cycling of supercapacitors in hybrid EV applications [J].
Pell, WG ;
Conway, BE ;
Adams, WA ;
de Oliveira, J .
JOURNAL OF POWER SOURCES, 1999, 80 (1-2) :134-141
[10]   Structural and spectroelectrochemical investigations of sol-gel derived electrochromic spinel Co3O4 films [J].
Svegl, F ;
Orel, B ;
Hutchins, MG ;
Kalcher, K .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (05) :1532-1539