| 添加剂对水热合成MnO_2电化学性能的影响 |
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| 引用本文： | 陈野,张巍,张尊波.添加剂对水热合成MnO_2电化学性能的影响[J].电源技术,2009,33(8). |
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| 作者姓名： | 陈野 张巍 张尊波 |
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| 作者单位： | 1. 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
2. 哈尔滨巨容新能源有限公司,黑龙江,哈尔滨,150078 |
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| 基金项目： | 教育部博士点基金资助 |
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| 摘 要： | 用异丙醇作为添加剂,采用水热法,在添加1 mL异丙醇的水溶液中制备了MnO2,并与在纯水中制备的MnO2进行比较,通过X射线衍射(XRD)、扫描电镜(SEM)对样品的结构、形貌进行了表征,结果显示,在异丙醇水溶液中合成的样品具有更高的结晶程度,为α-MnO2和γ-MnO2的混合相,添加异丙醇后改善了样品的微观颗粒形貌,提高了颗粒的分散度.电化学测试表明,添加异丙醇后样品的电化学性能得到明显改善,具有更好的循环伏安性能和更小的电化学阻抗,其在2 mA/cm2电流密度下放电比电容达到289.56 F/g.
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| 关 键 词： | 超级电容器 水热合成 超级电容性能 |
Effect of additive doping on electrochemical performance of hydrothermal prepared MnO_2 |
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| CHEN Ye,ZHANG Wei,ZHANG Zun-bo.Effect of additive doping on electrochemical performance of hydrothermal prepared MnO_2[J].Chinese Journal of Power Sources,2009,33(8). |
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| Authors: | CHEN Ye ZHANG Wei ZHANG Zun-bo |
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| Affiliation: | CHEN Ye1,ZHANG Wei1,ZHANG Zun-bo2 (1.College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin Heilongjiang 150001,China,2.Harbin Jurong New Power Co.,Ltd,Harbin Heilongjiang 150078,China) |
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| Abstract: | MnO_2 was prepared with 1 mL isopropanol doped by hydrothermal method, and properties of MnO_2 were compared with that prepared without additive. XRD, SEM analysis indicates that MnO_2 prepared with 1 mL isopropanol doped comparing with the one synthesized without additive exhibit higher crystallization degree and the composition of the sample is α-MnO_2 and γ-MnO_2. MnO2 with additive droped shows morphology of the particles improves and decentralization enhances. Resultes of electrochemical tests show that supercapacitor performance of MnO_2 with additive doped improved greatly. Isopropanol added attributed to better cycle performance and lower electrochemical impedance. Results of constant current charge/discharge show that the specific capacitance reaches 289.56 F/g at 2 mA/cm~2. |
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| Keywords: | MnO2 |
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