SnO_2/C电极的制备及超电性能研究
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摘要
采用了水热法制备二氧化锡纳米材料,后续掺入导电碳粉制备SnO_2/C复合材料.应用X射线衍射(XRD)对样品进行了表征.采用了循环伏安法、阻抗以及恒流充放电等测试来考察样品的性能.实验结果表明:SnO_2纳米材料具有良好的超电性能,有较小的内阻,在1 mA电流下进行充放电测试,比容量达45 F·g-1.掺杂碳粉之后,当质量比为SnO_2∶C=1∶2时,比电容可达到82.12 F·g-1,说明碳粉的掺入大大的提高了SnO_2的催化性能.
Stannic anhydrid nanomaterials were prepared by a hydrothermal method and then doped with conductive carbon powder to prepare composites of SnO_2/C.The samples were characterized by X-ray diffraction(XRD). Cyclic voltammetry,impedance and constant current charge-discharge tests were used to investigate their performance. The SnO_2 nanomaterials demonstrated good super-electrical performance and littleinternal resistance. The charge-discharge test was carried out at a current of 1 mA with a specific capacity of 45 F·g-1. After doping carbon,when the mass ratio was SnO_2∶C=1∶2,the specific capacitance could reach 82.12 F·g-1. This indicates that the addition of carbon powder greatly improved the catalytic performance of SnO_2.
Stannic anhydrid nanomaterials were prepared by a hydrothermal method and then doped with conductive carbon powder to prepare composites of SnO_2/C.The samples were characterized by X-ray diffraction(XRD). Cyclic voltammetry,impedance and constant current charge-discharge tests were used to investigate their performance. The SnO_2 nanomaterials demonstrated good super-electrical performance and littleinternal resistance. The charge-discharge test was carried out at a current of 1 mA with a specific capacity of 45 F·g-1. After doping carbon,when the mass ratio was SnO_2∶C=1∶2,the specific capacitance could reach 82.12 F·g-1. This indicates that the addition of carbon powder greatly improved the catalytic performance of SnO_2.
引文
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[9]Mei J,Zhang L.Anchoring High-dispersed MnO2Nanowires on Nitrogen Doped Graphene as Electrode Material for Supercapacitors[J].Electrochimica Acta,2015(173):338-344.
[10]Wang P F,Liu H,Xu Y X,et al. Supported ultra-ne ruthenium oxides with speci capacitance upto 1099 Fgà1for a supercapacitor[J].Electrochim Acta,2016(194):211-218.
[11]Yadav A.A.Spray deposition of tin oxide thin lms for supercapacitor applications:effect of solution molarity[J]. Mater Sci Mater Electron,2016(27):6985-6991.
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[13]惠珂霜.SnO2的微结构制备及其在超级电容器的应用[D].上海:华东师范大学,2014.
[14]张雅迪.SnO2、MnOOH和Bi2O3/碳布复合材料的制备及其在超级电容器中的应用与研究[D].兰州:西北师范大学,2016.
[15]Stejskal J,Kratochvil P.Polyaniline dispersions 2.UV-Vis absorption spectra[J].Synthetic Metals,1993,61(3):225-231.
[16]罗利军,谭学才.导电聚合物传感器的研究进展[J].分析测试学报,2005,24(4):122-127.
[17]Moller S,Periov C,Jaekon W,et al. Electrochromic conductive polymers fuses for hybrid organic/inorganic semiconductr memories[J].Journal of Applied Physics,2003(94):7811-7819.
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[19]Hunter J C.Preparation of a new crystal form of manganese dioxide:λ-MnO2[J].Journal of Solid State Chemistry,1981,39(2):142-147.