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. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%