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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 -1‚500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 J‚Pell W G‚Conway B E.Requirements for performance characterization of C double-layer supercapacitors:applications to a high specific-area C-cloth material. J Power Sources‚2006‚ 156:725 [2] Portet C‚Taberna P L‚Simon P‚et al.High power density elec￾trodes for carbon supercapacitor applications.Electrochim Acta‚ 2005‚50(20):4174 [3] Yoon Y S‚Cho W I‚Lim J H‚et al.Solid-state thin-film super￾capacitor with ruthenium oxide and solid electrolyte thin films.J Power Sources‚2001‚101:126 [4] Luan Z H‚Cheng C F‚Zhou W Z‚et al.Mesopore molecular￾sieve MCM-41containing framework aluminium.J Phys Chem‚ 1995‚99(3):1018 [5] Brunel D‚Blanc A C‚Galarneau A‚et al.New trends in the de￾sign of supported catalysts on mesoporous silicas and their applica￾tions in fine chemicals.Catal Today‚2002‚73(1/2):139 [6] Ko C H‚Ryoo R.Imaging the channels in mesoporous molecular sieves with platinum.Chem Commun‚1996(21):2467 [7] Wang Y Q‚Yang C M‚Schmidt W‚et al.Weakly ferromagnetic ordered mesoporous Co3O4 synthesized by nanocasting from vinyl functionalized cubic Ia3d mesoporous silica.A dv Mater‚2005‚ 17(1):53 [8] Tian B Z‚Liu X Y‚Yang H F‚et al.General synthesis of or￾dered crystallized metal oxide nanoarrays replicated by microwave￾digested mesoporous silica.A dv Mater‚2003‚15(16):1370 [9] Zhao D Y‚Feng J L‚Huo Q S‚et al.Triblock copolymer syn￾theses of mesoporous silica with periodic 50 to 300 angstrom pores.Science‚1998‚279(5350):548 [10] Zhao D Y‚Huo Q S‚Feng J L‚et al.Nonionic triblock and star diblock copolymer and oligomeric surfactant syntheses of highly ordered‚hydrothermally stable‚mesoporous silica structures.J A m Chem Soc‚1998‚120(24):6024 [11] Deng M G‚Zhang Z A‚Hu Y D‚et al.Study on carbon nan￾otubes/manganese dioxide composite electrode materials for su￾percapacitors.J Chin Ceram Soc‚2004‚32(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‚2004‚32(4):411) [12] Zhang Y‚Liu K Y‚Zhang W‚et al.Electrochemical perfor￾mance of electrodes in MnO supercapacitor. Acta Chim Sin‚ 2008‚66:909 (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‚2008‚66:909) [13] Cao C N‚Zhang J Q. A n Introduction to Electrochemical Impedance Spectroscopy.Beijing:Science Press‚2002:68 (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·
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