采用液相共沉积法合成了 RuO2/AC 复合电极材料,用扫描电镜对不同导电剂材料的形貌进行表征,进而通过循环伏安法、恒流充放电、交流阻抗谱研究了不同导电剂对RuO2/AC 复合电极材料超级电容器性能的影响.结果表明,在38%(质量分数)的H2 SO4溶液中,电流密度为2 mA/cm2,以 CNTs、AB、KS6、Super P Li 为导电剂时比容量和 ESR 分别为689,556,574和512 F/g,0.19,0.36,0.32和0.41Ω.
Amorphous hydrous ruthenium oxide/active carbon composite electrode materials prepared by the liq-uid phase codeposition.The morphology of the conductive agents were investigated by SEM.Based on the cyclic voltammetry,AC impedance spectroscopy and constant current charge-discharge techniques,the performances of the RuO2/AC composite electrodes materials which add different conductive agent are investigated.The re-sults show that when CNTs,AB,KS6 and Super P Li were used as conductive agent,the materials specific ca-pacitance of RuO2/AC composite electrodes was 689,556,574 and 512 F/g,respectively,the equivalent series resistance was 0.19,0.36,0.32 and 0.41 Ω,measured at 5 mV/s in 38% (mass fraction)H2SO4 and under the current density of 2 mA/cm2 .
参考文献
[1] | 唐致远,耿新,王占良,徐国祥.金属氧化物电化学电容器[J].化学通报,2003(01):33-38. |
[2] | Chi-Chang Hu;Chen-Ching Wang;Kuo-Hsin Chang .A comparison study of the capacitive behavior for sol-gel-derived and co-annealed ruthenium-tin oxide composites[J].Electrochimica Acta,2007(7):2691-2700. |
[3] | Tanahashi I;Yoshida A;Nishino A .Electrochemical characterization of activated carbon-fiber cloth polarizable electrodes for electric double-layer capacitors[J].J Elec-trochem Soc,1990,137(10):3052-3057. |
[4] | Conway B E .Transition from “supercapacitor”to“battery”behavior in electrochemical energy storage[J].J Electrochem Soc,1991,138(06):1539-1548. |
[5] | Chemical Reviews Group .What Are Batteries,Fuel Cells,and Supercapacitors?[J].Chemical Reviews,2004(10):4245-4269. |
[6] | Katsuhiko Naoi;Shuichi Ishimoto;Nobuhiro Ogihara .Encapsulation of Nanodot Ruthenium Oxide into KB for Electrochemical Capacitors[J].Journal of the Electrochemical Society,2009(1):A52-A59. |
[7] | Zheng JP.;Jow TR.;Cygan PJ. .HYDROUS RUTHENIUM OXIDE AS AN ELECTRODE MATERIAL FOR ELECTROCHEMICAL CAPACITORS[J].Journal of the Electrochemical Society,1995(8):2699-2703. |
[8] | Wu Z S;Wang D W;Ren W et al.Anchoring hydrous RuO2 on graphene sheets for high-performance electro-chemical capacitors[J].Advanced Functional Materials,2010(20):3595-3602. |
[9] | Kim H;Popov B N .Characterization of hydrous rutheni-um oxide/carbon nanocomposite supercapacitors prepared by a colloidal method[J].Journal of Power Sources,2002,104(01):52-61. |
[10] | Rosario A V;Bulhoes L O S;Pereira E C .Investigation of pseudocapacitive properties of RuO2 film electrodes prepared by polymeric precursor method[J].Journal of Power Sources,2006,158(01):795-800. |
[11] | 王杰,徐友龙,马建华,张选红,蒙林斌,石洪富,蒋春强,彭丹.循环伏安沉积纳米氧化钌基超级电容器电极材料[J].稀有金属材料与工程,2012(08):1467-1471. |
[12] | Stoller M D;Ruoff R S .Best practice methods for deter-mining an electrode material's performance for ultraca-pacitors[J].Energy & Environmental Science,2010,3(09):1294-1301. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%