薛云,陈野,张密林

• 1:哈尔滨工程大学材料科学与化学工程学院
• 2:哈尔滨工程大学材料科学与化学工程学院
• 3:哈尔滨工程大学材料科学与化学工程学院 黑龙江哈尔滨150001
• 4:黑龙江哈尔滨150001

摘要(Abstract)：

采用高温固相法制备尖晶石型LiMn2O4电极材料。XRD结果表明经700℃煅烧即可得到尖晶石型LiMn2O4样品。利用恒流充放电、循环伏安和交流阻抗等测试方法研究了合成过程中温度和时间对尖晶石型LiMn2O4电极材料在2mol.L-1(NH4)2SO4溶液中电容性能的影响。结果表明LiMn2O4电极材料具有较好的电容性能。恒流充放电和循环伏安结果表明,当煅烧温度700℃,恒温时间4~24h时,其容量并没有明显的变化,电流密度为10mA.cm-2时,其放电比容量保持在127F.g-1。交流阻抗结果也表明,LiMn2O4电极在2mol.L-1(NH4)2SO4溶液中具有较好的电化学电容行为,700℃下煅烧的样品的溶液欧姆电阻仅为0.5Ω。

关键词(KeyWords)： LiMn2O4;超级电容器;高温固相法

Abstract:

Keywords:

基金项目(Foundation): 教育部博士点基金资助(20050217019)

作者(Author): 薛云,陈野,张密林

参考文献(References)：

• [1]Burke A.Ultracapacitors:why,how,and where is the technology[J].J Power Sources,2000,91(1):37-50.
• [2]Winter M,Brodd R J,What are batteries,fuel cells,and supercapacitors[J].J Chem Rev,2004,104(10):4245-4270.
• [3]Taberna P L,Chevallier G,Simon P,et al.Activated carbon-carbon nanotube composite porous film for supercapacitor applications[J].Mater Res Bull,2006,41(3):478-484.
• [4]Arbizzani C,Soavi F,Mastragostino M.A novel galvanostatic polymerization for high specific capacitance poly(3-methylthiophene)in ionic liquid[J].JPower Sources,2006,162(1):735-737.
• [5]Nagarajan N,Humadi H,Zhitomirsky I.Cathodic electrodeposition of MnOx films for electrochemical supercapacitors[J].Electrochim Acta,2006,51(15):3039-3045.
• [6]Song G M,Li W J,Zhou Y.Synthesis of Mg-doped LiMn2O4powders for lithium-ion batteries by rotary heating[J].Mater Chem Phys,2004,87(1):162-167.
• [7]Zhang Y,Shin H C,Dong J,et al.Nanostructured LiMn2O4prepared by a glycine-nitrate process for lithium-ion batteries[J].Solid State Ion,2004,171(1-2):25-31.
• [8]李运姣,李洪桂,赵中伟,等.机械活化-湿化学合成LiMn2O4的组成、结构与表征[J].中国有色金属学报,2004,14(F01):112-117.LI Yun-jiao,LI Hong-gui,ZHAO Zhong-wei,et al.Characterization,structure and performances of LiMn2O4synthesized by mechanically activated-wetchemistry[J].The Chinese Journal of Nonferrous Metals,2004,14(F01):112-117.
• [9]唐新村,杨幼平,李立清,等.LiMn2L(Ac)2热分解制备的尖晶石LiMn2O4及其电化学性能[J].中国有色金属学报,2004,14(5):871-876.TANG Xin-cun,YANG You-ping,LI Li-qing,et al.Preparation of spinel LiMn2O4by thermo-decomposition of LiMn2L(Ac)2and its electrochemicalproperties[J].The Chinese Journal of Nonferrous Metals,2004,14(5):871-876.
• [10]王要武,蔡砚,何向明,等.尖晶石LiMn2O4作为锂离子正极材料的研究与开发[J].无机材料学报,2004,19(01):1-8.WANG Yao-Wu,CAI Yan,HE Xiang-Ming,et al.Development of spinel LiMn2O4for positive electrode material of Li-ion batteries[J].Journal of InorganicMaterial,2004,19(01):1-8.
• [11]Nakayama M,Watanabe K,Ikuta H,et al.Grain size control of LiMn2O4cathode material using microwave synthesis method[J].Solid State Ion,2003,164(1-2):35-42.
• [12]姚耀春,戴永年,任海伦,等.合成温度与时间对尖晶石LiMn2O4性能的影响[J].有色金属,2005,57(02):32-34.YAO Yao-chun,DAI Yong-nian,REN Hai-lun,et al.Effects of temperature and time on spinal LiMn2O4performance[J].Nonferrous Metals,2005,57(02):32-34.
• [13]吕东生,李伟善.LiMn2O4/LiPF6-(EC+DEC)溶液界面电化学研究[J].无机材料学报,2004,19(4):801-808.L Dong-sheng,LI Wei-shan.Electrochemical investigation on the interface performances of LiMn2O4/LiPF6-(EC+DEC)solution[J].Journal of InorganicMaterials,2004,19(4):801-808.
• [14]Zhang S S,Ervin M H,Xu K,et al.Microporous poly(acrylonitrile-methyl methacrylate)membrane as a separator of rechargeable lithium battery[J].Electrochim Acta,2004,49(20):3339-3345.
• [15]Sugimoto W,Kizaki T,Yokoshima K,et al.Evaluation of the pseudocapacitance in RuO2with a RuO2/GC thin film electrode[J].Electrochim Acta,2004,49(2):313-320.
• [16]Girija T C,Sangaranarayanan M V.Investigation of polyaniline-coated stainless steel electrodes for electrochemical supercapacitors[J].Synthetic Metals,2006,156(2-4):244-250.

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