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以不同粒度范围的石油焦为原料,KOH为活化剂,采用化学活化工艺制备了超级电容器用活性炭电极材料.采用N2吸附法表征了活性炭材料的BET比表面积及孔结构;在1mol/L的Et4NBF4/AN有机电解液体系下组装成模拟电容器,并考察了活性炭材料的电化学性能.结果表明:随着原料粒度的减小,活性炭的振实密度和收率先增大,然后再减小.原料粒度范围越窄,活性炭具有越小的BET比表面积和孔容.在1mol/L的Et4NBF4/AN电解液体系下,随着石油焦粒度的不断减小,活性炭材料的质量比容量不断增大,在粒度<38μm时取得最大值140F/g.粒度为38~44μm的石油焦制备出的活性炭在1A/g电流下质量比容量为126.6F/g,在20A/g电流下质量比容量为116.2F/g,容量衰减只有8.2%,表现出良好的功率特性.

参考文献

[1] Portet C;Taberna P L;Simon P et al.[J].Electrochimiea Aeta,2005,50(20):4174-4181.
[2] Burke A .[J].Journal of Power Sources,2000,91(01):37-50.
[3] J.P. Zheng;T.R. Jow .High energy and high power density electrochemical capacitors[J].Journal of Power Sources,1996(2):155-159.
[4] Faggioli E;Rena P;Danel V et al.[J].Journal of Power Sources,1999,4(02):261-269.
[5] Conway B E;Pell W G .[J].Journal of Power Sources,2002,105(02):169-181.
[6] A. G. Pandolfe;A. F. Hollenkamp .Carbon properties and their role in supercapacitors[J].Journal of Power Sources,2006(1):11-27.
[7] 陈晓妹,刘亚菲,胡中华,杨静.高性能炭电极材料的制备和电化学性能研究[J].功能材料,2008(05):771-774,778.
[8] De Yangqu .[J].Journal of Power Sources,2002,109(02):403-411.
[9] Elzbieta Frackowiak;Francois Beguin .Carbon materials for the electrochemical storage of energy in capacitors[J].Carbon: An International Journal Sponsored by the American Carbon Society,2001(6):937-950.
[10] Lillo-Rodenas M A;Cazorla-Amoros D;Linares-Solano A .[J].CARBON,2003,41:267-275.
[11] Carbalho P A;Cardoso B P .[J].CARBON,2003,41(14):2873-2884.
[12] 方勤,杨邦朝.超级电容器用中孔炭的研究[J].功能材料,2005(12):1889-1891.
[13] B.Petrova;T.Budinova;N.Petrov;E.Ekinci;M.Razvigorova .Effect of different oxidation treatments on the chemical structure and properties of commercial coal tar pitch[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(2):261-267.
[14] Teng HS.;Wang SC. .Preparation of porous carbons from phenol-formaldehyde resins with chemical and physical activation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2000(6):817-824.
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