OMS-5型纳米MnO_2电极材料的制备与电化学性能研究Preparation and electrochemical performances of OMS-5 type nano-MnO_2 electrode materials
朱杨军;代芳;谭军艳;徐雅梅;万园慧;皇甫之欣;占淑荣;章磊;温祖标;
摘要(Abstract):
以Mn Cl_2、KMn O_4和Na OH为反应物原料,采用液相氧化还原法制备得到层状二氧化锰中间体,然后以层状二氧化锰和Na OH为原料,采用水热法制备了OMS-5型(八面体分子筛)纳米Mn O_2电极材料。分别用X射线衍射光谱、扫描电镜和傅里叶-红外光谱等表征样品的晶体结构、形貌和键合特性;采用循环伏安、恒流充放电和交流阻抗等方法研究其电化学性能。结果表明:OMS-5型纳米Mn O_2结晶良好,直径约为50 nm;在0.5 mol/L的Li_2SO_4和Na_2SO_4电解液中,电流密度为0.1 A/g时,其比电容分别为47.4、170.3 F/g;等效串联电阻和漏电流小,在Na_2SO_4电解液中展现出良好的循环稳定性,表明该OMS-5型纳米Mn O_2是一种可能具有应用前景的超级电容器电极材料。
关键词(KeyWords): 超级电容器;电极材料;MnO2;纳米棒
基金项目(Foundation): 国家自然科学基金资助项目(21463013);; 江西省自然科学基金资助项目(20142BAB203013)
作者(Author): 朱杨军;代芳;谭军艳;徐雅梅;万园慧;皇甫之欣;占淑荣;章磊;温祖标;
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DOI: 10.14024/j.cnki.1004-244x.20160302.018
参考文献(References):
- [1]WANG G P,ZHANG L,ZHANG J J.A review of electrode materials for electrochemical supercapacitors[J].Chem Soc Rev,2012,41(2):797-828.
- [2]邵光杰,孙立娟,何佩,等.超级电容器电极材料Mn O2的制备及其性能研究[J].兵器材料科学与工程,2007,30(4):48-51.
- [3]WANG F X,XIAO S Y,HOU Y Y,et al.Electrode materials for aqueous asymmetric supercapacitors[J].RSC Adv,2013,32(3):13059-13084.
- [4]高书燕,范豪.基于金属氧化物的赝电容器[J].化学通报,2013,76(3):202-209.
- [5]MILLER J R,SIMON P.Materials science-electrochemical capacitors for energy management[J].Science,2008,321(5889):651-652.
- [6]DU J P,SHAO G J,QIN X J,et al.High specific surface area Mn O2electrodeposited under supergravity field for supercapacitors and its electrochemical properties[J].Mater Lett,2012,84:13-15.
- [7]THACKERAY M M.Manganese oxides for lithium batteries[J].Prog Solid State Ch,1997,25(1/2):1-71.
- [8]GHODBANE O,PASCAL J L,FAVIER F.Microstructural effects on charge-storage properties in Mn O2-based electrochemical supercapacitors[J].ACS Appl Mater Interfaces,2009,1(5):1130-1139.
- [9]DEVARAJ S,MUNICHANDRAIAH N.Effect of crystallographic structure of Mn O2on its electrochemical capacitance properties[J].J Phys Chem C,2008,112(11):4406-4417.
- [10]SHEN X F,DING Y S,LIU J,et al.Control of nanometerscale tunnel sizes of porous manganese oxide octahedral molecular sieve nanomaterials[J].Adv Mater,2005,17(7):805-809.
- [11]XIA G G,TONG W,TOLENTINO E N,et al.Synthesis and characterization of nanofibrous sodium manganese oxide with a 2 x 4 tunnel structure[J].Chem Mater,2001,13(5):1585-1592.
- [12]QU Q T,WANG B,YANG L C,et al.Study on electrochemical performance of activated carbon in aqueous Li2SO4,Na2SO4and K2SO4electrolytes[J].Electrochem Commun,2008,10(10):1652-1655.
- [13]QU Q T,ZHANG P,WANG B,et al.Electrochemical performance of Mn O2nanorods in neutral aqueous electrolytes as a cathode for asymmetric supercapacitors[J].J Phys Chem C,2009,113(31):14020-14027.
- [14]ZHANG B H,LIU Y,CHANG Z,et al.Nanowire Na0.35Mn O2from a hydrothermal method as a cathode material for aqueous asymmetric supercapacitors[J].J Power Sources,2014,253:98-103.
- [15]ZHAO D,GUO X Y,GAO Y,et al.An electrochemical capacitor electrode based on porous carbon spheres hybrided with polyaniline and nanoscale ruthenium oxide[J].ACS Appl Mater Interfaces,2012,4(10):5583-5589.
- [16]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[J].化学学报,2008,66(8):909-913.
- [17]FRACKOWIAK E,BEGUIN F.Carbon materials for the electrochemical storage of energy in capacitors[J].Carbon,2001,39(6):937-950.
- [18]闻斌,魏双,施展,等.稻壳多孔碳材料的电容性能及模型计算[J].高等学校化学学报,2013,34(3):674-678.
- [19]温祖标,刘亚菲,胡中华,等.薄层晶状α-Mn O2/活性炭复合电极材料的制备和电化学性质[J].化学学报,2008,68(15):1473-1480.