以椰壳活性炭和杏壳活性炭为原料,采用浓硝酸液相氧化改性处理后,制成以KOH为电解液的超级电容器的炭电极.采用低温N2吸附法表征了活性炭的孔结构性质,并采用循环伏安法和交流阻抗法考察了活性炭电极的电化学性能.实验表明,经浓硝酸氧化处理后,活性炭的比表面积和孔容降低,平均孔径增大.但由于氧化处理后材料赝电容的增加,椰壳活性炭和杏壳活性炭的放电容量不但没有降低,反由原来的114 F·g-1和98 F·-1分别增大到166 F·g-1和157 F·g-1.同时,浓硝酸氧化降低了活性炭电极的表面电荷迁移电阻和时间常数.
参考文献
| [1] | Conway B E.Electrochemical supercapacitor[M].New York:Kluwer Academic/Plunum Publishers,1999:200-234. |
| [2] | Burke A .Ultracapacitors:why,how,and where is the technology[J].Journal of Power Sources,2000,91(01):37-50. |
| [3] | Yau-Ren Nian;Hsisheng Teng .Nitric Acid Modification of Activated Carbon Electrodes for Improvement of Electrochemical Capacitance[J].Journal of the Electrochemical Society,2002(8):A1008-A1014. |
| [4] | Yau Ren Nian;Hsisheng Teng .Influence of surface oxides on the impedance behavior of carbon-based electrochemical capacitors[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2003(0):119-127. |
| [5] | 侯朝辉 .高比表面积中孔炭材料的制备及其双电层电容性能研究[D].中南大学,2004. |
| [6] | 杜嬛,王成扬,时志强,郭春雨.表面含氧官能团对活性炭电化学性能的影响[J].天津大学学报,2006(12):1479-1484. |
| [7] | P.L. Taberna;P. Simon;J.F. Fauvarque .Electrochemical Characteristics and Impedance Spectroscopy Studies of Carbon-Carbon Supercapacitors[J].Journal of the Electrochemical Society,2003(3):A292-A300. |
| [8] | 文越华,程杰,曹高萍,杨裕生.玻态炭经电化学活化处理后的电容特性[J].电源技术,2003(05):455-458,461. |
| [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] | E. Frackowiak;K. Metenier;V. Bertagna .Supercapacitor electrodes from multiwalled carbon nanotubes[J].Applied physics letters,2000(15):2421-2423. |
| [11] | Chun-Mo Yang;Jeh Beck Ju;Joong Kee Lee;Won Il Cho;Byung Won Cho .Electrochemical performances of electric double layer capacitor with UV-cured gel polymer electrolyte based on poly[(ethylene glycol)diacrylate]-poly(vinylidene fluoride) blend[J].Electrochimica Acta,2005(9):1813-1819. |
| [12] | Wei-Chih Chen;Ten-Chin Wen;Hsisheng Teng .Polyaniline-deposited porous carbon electrode for supercapacitor[J].Electrochimica Acta,2003(6):641-649. |
| [13] | Ying-ke Zhou;Ben-lin He;Wen-jia Zhou;Jier Huang;Xiao-hong Li;Bin Wu;Hu-lin Li .Electrochemical capacitance of well-coated single-walled carbon nanotube with polyaniline composites[J].Electrochimica Acta,2004(2):257-262. |
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%