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4-2Ah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"(-1H4)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05Ω.
参考文献
| [1] | Burke A .Uhracapacitors:why,how,and where is the technology[J].Journal of Power Sources,2000,91(01):37-50. |
| [2] | Winter M;Brodd R J .What are hatteries,fuel cells,and supereapacitors[J].Journal of Chemical Reviews,2004,104(10):4245-4270. |
| [3] | Taberna P L;Chevallier G;Simon P et al.Activated carbon-carbon nonotube composite porous film for supercapacitor applications[J].Mater Res Boll,2006,41(03):478-484. |
| [4] | Catia Arbizzani;Francesca Soavi;Marina Mastragostino .A novel galvanostatic polymerization for high specific capacitance poly(3-methylthiophene) in ionic liquid[J].Journal of Power Sources,2006(1):735-737. |
| [5] | Nagarajan N;Humadi H;Zhitomirsky 1 .Cathodic electredepesition of MnOx films for electrochemical sopereapacitors[J].Electrochim Aeta,2006,51(15):3039-3045. |
| [6] | Song GM;Li WJ;Zhou Y .Synthesis of Mg-doped LiMn2O4 powders for lithium-ion batteries by rotary heating[J].Materials Chemistry and Physics,2004(1):162-167. |
| [7] | Zhang Y;Shin HC;Dong J;Liu M .Nanostructured LiMn2O4 prepared by a glycine-nitrate process for lithium-ion batteries[J].Solid state ionics,2004(1/2):25-31. |
| [8] | 李运姣,李洪桂,赵中伟,孙培梅,霍广生,孙召明.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(z1):112-117. |
| [9] | 唐新村,杨幼平,李立清,贾殿赠,黄可龙.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(05):871-876. |
| [10] | 王要武,蔡砚,何向明,应皆荣.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(01):1-8. |
| [11] | akayama M;Watanabe K;Ikuta H et al.Grain size control of LiMn2O4 cathede material using microwave synthesis methed[J].Solid State Ionics,2003,164(1-2):35-42. |
| [12] | 姚耀春,戴永年,任海伦,李伟宏,崔萌佳.合成温度与时间对尖晶石LiMn2O4性能的影响[J].有色金属,2005(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(04):801-808. |
| [14] | S. S. Zhang;M. H. Ervin;K. Xu;T. R. low .Microporous poly(acrylonitrile-methyl methacrylate) membrane as a separator of rechargeable lithium battery[J].Electrochimica Acta,2004(20):3339-3345. |
| [15] | Sugimoto W;Kizaki T;Yokoshima K et al.Evaluation of the peeudocapacitance in RuO2 with a RuO2/GC thin film electrede[J].Eiectrachim Acta,2004,49(02):313-320. |
| [16] | Girija T C;Sangaranarayanon M V .Investigation of polyaniline-conted stainless steel electredes for electrochemical supercapacitors[J].Synthetic Metals,2006,156(2-4):244-250. |
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