第12期 孙哲等:超声一浸渍法制备介孔MO2及其性质表征 .1599. 子转移过程时赝电容充电的过程,即反应电阻.从 1995,99(3):1018 图中可以计算出两者的电化学反应电阻分别为 [5]Brunel D.Blanc A C.Galarneau A.et al.New trends in the de- 0.102和0.62n.由此可看出介孔Mn02作为超级 sign of supported catalysts on mesoporous silicas and their applica- tions in fine chemicals.Catal Today.2002.73(1/2):139 电容器电极的法拉第反应电阻较小,这也证明了前 [6]Ko C H.Ryoo R.Imaging the channels in mesoporous molecular 文介孔MnO2具有较高电化学活性的论述. sieves with platinum.Chem Commun.1996(21):2467 3结论 [7]Wang Y Q.Yang C M.Schmidt W.et al.Weakly ferromagnetic ordered mesoporous Co304 synthesized by nanocasting from vinyl 以SBA一15为硬模板,采用超声一浸渍法合成出 functionalized cubic la3d mesoporous silica.Ade Mater,2005. 介孔Mn02,样品复制了SBA一l5的二维六角介孔 17(1):53 [8]Tian B Z,Liu X Y,Yang H F,et al.General synthesis of or- 结构,比表面积和平均孔径分别为282m2g和 dered crystallized metal oxide nanoarrays replicated by microwave 2.75nm,颗粒形状不规则,无定形含量较多.介孔 digested mesoporous silica.Ado Mater,2003.15(16):1370 MnO2在6molL-1K0H体系中电荷转移电阻低, [9]Zhao D Y.Feng J L.Huo Q S,et al.Triblock copolymer syn 扩散动力学特征良好,电化学活性高,质子和电子能 theses of mesoporous silica with periodic 50 to 300 angstrom pores.Science,1998,279(5350):548 快速嵌入和脱出,表现出良好的电化学电容特性,首 [10]Zhao D Y,Huo QS,Feng JL.et al.Nonionic triblock and star 次放电比容量为285Fg,500次循环后放电容量 diblock copolymer and oligomeric surfactant syntheses of highly 保持在210Fg1,可作为超级电容器的理想电极 ordered,hydrothermally stable,mesoporous silica structures.J 材料 Am Chem Soc,1998,120(24):6024 [11]Deng M G.Zhang Z A.Hu Y D.et al.Study on carbon nan 参考文献 otubes/manganese dioxide composite electrode materials for su [1]Niu JJ.Pell W G,Conway B E.Requirements for performance percapacitors.JChin Ceram Soc.2004.32(4):411 characterization of C double-layer supercapacitors:applications to (邓梅根,张治安,胡永达,等.超级电容器碳纳米管与二氧 a high specific-area C-cloth material.J Power Sources,2006, 化锰复合电极材料的研究.硅酸盐学报,2004,32(4):411) 156,725 [12]Zhang Y.Liu K Y.Zhang W,et al.Electrochemical perfor- [2]Portet C.Taberna P L.Simon P,et al.High power density elee- mance of electrodes in MnO supercapacitor.Acta Chim Sin, trodes for carbon supercapacitor applications.Electrochim Acta, 2008,66.909 2005,50(20):4174 (张莹,刘开宇,张伟,等.二氧化锰超级电容器的电极电化 [3]Yoon Y S,Cho W I,Lim J H,et al.Solid-state thin film super- 学性质.化学学报,2008,66:909) capacitor with ruthenium oxide and solid electrolyte thin films.J [13]Cao C N.Zhang J Q.An Introduction to Electrochemical Power Sources.2001,101:126 Impedance Spectroscopy.Beijing:Science Press.2002:68 [4]Luan Z H.Cheng C F,Zhou W Z,et al.Mesopore molecular (曹楚南,张鉴清。电化学阻抗谱导论。北京:科学出版社, sieve MCM-41 containing framework aluminium.Phys Chem. 2002:68)子转移过程时赝电容充电的过程即反应电阻.从 图中可以计算出两者的电化学反应电阻 RF 分别为 0∙10Ω和0∙62Ω.由此可看出介孔 MnO2 作为超级 电容器电极的法拉第反应电阻较小这也证明了前 文介孔 MnO2 具有较高电化学活性的论述. 3 结论 以 SBA-15为硬模板采用超声-浸渍法合成出 介孔 MnO2样品复制了 SBA-15的二维六角介孔 结构比表面积和平均孔径分别为282m 2·g -1和 2∙75nm颗粒形状不规则无定形含量较多.介孔 MnO2在6mol·L -1 KOH 体系中电荷转移电阻低 扩散动力学特征良好电化学活性高质子和电子能 快速嵌入和脱出表现出良好的电化学电容特性首 次放电比容量为285F·g -1500次循环后放电容量 保持在210F·g -1可作为超级电容器的理想电极 材料. 参 考 文 献 [1] Niu J JPell W GConway B E.Requirements for performance characterization of C double-layer supercapacitors:applications to a high specific-area C-cloth material. J Power Sources2006 156:725 [2] Portet CTaberna P LSimon Pet al.High power density electrodes for carbon supercapacitor applications.Electrochim Acta 200550(20):4174 [3] Yoon Y SCho W ILim J Het al.Solid-state thin-film supercapacitor with ruthenium oxide and solid electrolyte thin films.J Power Sources2001101:126 [4] Luan Z HCheng C FZhou W Zet al.Mesopore molecularsieve MCM-41containing framework aluminium.J Phys Chem 199599(3):1018 [5] Brunel DBlanc A CGalarneau Aet al.New trends in the design of supported catalysts on mesoporous silicas and their applications in fine chemicals.Catal Today200273(1/2):139 [6] Ko C HRyoo R.Imaging the channels in mesoporous molecular sieves with platinum.Chem Commun1996(21):2467 [7] Wang Y QYang C MSchmidt Wet al.Weakly ferromagnetic ordered mesoporous Co3O4 synthesized by nanocasting from vinyl functionalized cubic Ia3d mesoporous silica.A dv Mater2005 17(1):53 [8] Tian B ZLiu X YYang H Fet al.General synthesis of ordered crystallized metal oxide nanoarrays replicated by microwavedigested mesoporous silica.A dv Mater200315(16):1370 [9] Zhao D YFeng J LHuo Q Set al.Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores.Science1998279(5350):548 [10] Zhao D YHuo Q SFeng J Let al.Nonionic triblock and star diblock copolymer and oligomeric surfactant syntheses of highly orderedhydrothermally stablemesoporous silica structures.J A m Chem Soc1998120(24):6024 [11] Deng M GZhang Z AHu Y Det al.Study on carbon nanotubes/manganese dioxide composite electrode materials for supercapacitors.J Chin Ceram Soc200432(4):411 (邓梅根张治安胡永达等.超级电容器碳纳米管与二氧 化锰复合电极材料的研究.硅酸盐学报200432(4):411) [12] Zhang YLiu K YZhang Wet al.Electrochemical performance of electrodes in MnO supercapacitor. Acta Chim Sin 200866:909 (张莹刘开宇张伟等.二氧化锰超级电容器的电极电化 学性质.化学学报200866:909) [13] Cao C NZhang J Q. A n Introduction to Electrochemical Impedance Spectroscopy.Beijing:Science Press2002:68 (曹楚南张鉴清.电化学阻抗谱导论.北京:科学出版社 2002:68) 第12期 孙 哲等: 超声-浸渍法制备介孔 MnO2 及其性质表征 ·1599·