采用硝酸对沥青烯基有序介孔炭(Ordered mesoporous carbon,OMC)进行氧化处理,在硝酸浓度为5mol/L、40℃～100℃下,考察了氧化温度对沥青烯基OMC的孔结构和电化学性能的影响,讨论了不同表面化学氛围的OMC孔道内电解液离子的传输过程.OMC的结构表征和性能测试采用XRD、物理吸附仪和电化学工作站等技术.结果表明:适度的硝酸氧化处理可以有效地改善OMC的电化学性能,低温氧化处理在化学改性OMC表面的同时,仍能保持其规则的孔道结构,比表面积和孔容基本不变;60℃氧化处理时,OMC表现出良好的双电层电化学行为和频率响应特性,电容器可以保持较快的充放电速率,时间常数约为6s;在5mV·s-1的扫描速率下其质量比电容值和能量密度分别为138F·g-1和3.9Wh·kg-1,较改性前分别提高了57%和63%.
参考文献
| [1] | 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. |
| [2] | Yong Zhang;Hui Feng;Xingbing Wu;Lizhen Wang;Aiqin Zhang;Tongchi Xia;Huichao Dong;Xiaofeng Li;Linsen Zhang .Progress of electrochemical capacitor electrode materials: A review[J].International journal of hydrogen energy,2009(11):4701-4707. |
| [3] | A. G. Pandolfe;A. F. Hollenkamp .Carbon properties and their role in supercapacitors[J].Journal of Power Sources,2006(1):11-27. |
| [4] | Frackowiak E .Carbon materials for supercapacitor application[J].Physical chemistry chemical physics: PCCP,2007(15):1774-1785. |
| [5] | Ryoo R;Joo S H;Jun S .Synthesis of highly ordered carbon molecular sieves via template-mediated structural transformation[J].Journal of Physical Chemistry B,1999,103(37):7743-7746. |
| [6] | Lee Jinwoo;Yoon Songhun .Synthesis of a new mesoporous carbon and its application to electrochemical double-layer capacitors[J].Chemical communications,1999(21):2177-2178. |
| [7] | W. Xing;S.Z. Qiao;R.G. Ding .Superior electric double layer capacitors using ordered mesoporous carbons[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(2):216-224. |
| [8] | 王大伟,李峰,刘敏,成会明.硝酸氧化改性SBA-15 模板合成的中孔炭电容性能研究[J].新型炭材料,2007(04):307-314. |
| [9] | X.L. Chen;W.S. Li;C.L. Tan;W. Li;Y.Z. Wu .Improvement In Electrochemical Capacitance Of Carbon Materials By Nitric Acid Treatment[J].Journal of Power Sources,2008(2):668-674. |
| [10] | 谢应波,乔文明,张维燕,孙刚伟,凌立成.活性炭表面改性对双电层电容器电化学性能的影响[J].新型炭材料,2010(04):248-254. |
| [11] | 周颖,余桂红,张艳,李俊宁,邱介山.模板法制备沥青烯基有序结构中孔炭[J].新型炭材料,2008(01):63-68. |
| [12] | 周颖,刘小雪,王六平,许钦一,王志超,邱介山.基于预沥青烯的有序结构中孔炭及其电化学性能[J].化工学报,2009(09):2359-2364. |
| [13] | Kinetics of coal liquefaction during heating-up and isothermal stages[J].Fuel,2008(4):508-513. |
| [14] | Zhao D Y;Feng J L;Huo Q S et al.Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores[J].Science,1998,279(5350):548-552. |
| [15] | Meng Y;Gu D;Zhang FQ;Shi YF;Cheng L;Feng D;Wu ZX;Chen ZX;Wan Y;Stein A .A family of highly ordered mesoporous polymer resin and carbon structures from organic-organic self-assembly[J].Chemistry of Materials: A Publication of the American Chemistry Society,2006(18):4447-4464. |
| [16] | Bazula P A;Lu A H;Nitz J J et al.Surface and pore stracture modification of ordered mesoporous carbons via a chemical oxidation approach[J].Microporous and Mesoporous Materials,2008,108(1-3):266-275. |
| [17] | Chien-To Hsieh;Hsisheng Teng .Influence of oxygen treatment on electric double-layer capacitance of activated carbon fabrics[J].Carbon: An International Journal Sponsored by the American Carbon Society,2002(5):667-674. |
| [18] | 梁逵,陈艾,冯哲圣,叶芝祥.碳纳米管电极超大容量离子电容器交流阻抗特性[J].物理化学学报,2002(04):381-384. |
| [19] | 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. |
| [20] | Chmiola J;Yushin G;Dash R et al.Effect of pore size and surface area of carbide derived carbons on specific capacitance[J].Journal of Power Sources,2006,158(01):765-772. |
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