王晗,李曼,许海媚,祝江赛,王志峰,秦春玲.纳米多孔铜银/二氧化锰复合电极材料的制备及储能研究[J].稀有金属材料与工程,2018,47(12):3860~3866.[Wang han,Li man,Xu haimei,Zhu jiangsai,Wang zhifeng,Qin chunling.The Preparation of Nanoporous CuAg Bimetal/Manganese Dioxide Composites and High Performance Button Type Electrochemistry Energy Storage Device[J].Rare Metal Materials and Engineering,2018,47(12):3860~3866.]
纳米多孔铜银/二氧化锰复合电极材料的制备及储能研究
投稿时间:2017-04-02  修订日期:2017-09-14
中文关键词:  铜基非晶前驱体合金  纳米多孔铜银双金属  二氧化锰  电化学储能器件  比电容
基金项目:国家自然科学基金(项目号51671077),河北省自然科学基金(E2016202212,E2015202081),河北省百人计划(E2012100009),研究生创新项目(220056)
中文摘要:
      以Cu-Zr-Ag非晶合金作为前驱体,利用快速凝固技术和脱合金相结合的方法制备纳米多孔铜银双金属(NP-CuAg),通过化学沉淀法使MnO2在NP-CuAg上形核生长,成功制备出NP-CuAg和MnO2的复合电极材料(NP-CuAg/MnO2)。利用XRD、SEM分析材料的相组成及微观形貌,通过循环伏安法和恒流充放电法研究复合电极材料的电容特性。结果表明:兼具三维连续纳米孔洞结构及优异导电性的NP-CuAg作为依附载体可大幅度提高MnO2颗粒的分散度和电极材料导电性,使其电化学性能得以充分发挥。复合电极材料的比电容值随着前驱体合金中银含量的增加而提高,前驱体合金中Ag含量为10 at.%时电容值可达392.86 F/g。封装成可反复充放电的纽扣型电化学储能器件,可成功对LED灯泡供电。
The Preparation of Nanoporous CuAg Bimetal/Manganese Dioxide Composites and High Performance Button Type Electrochemistry Energy Storage Device
英文关键词:Cu-based metallic glasses precursor  nanoporous CuAg bimetal  manganese dioxide  electrochemistry energy storage device  specific capacitance
英文摘要:
      Nanoporous CuAg bimetal/manganese dioxide (NP-CuAg/MnO2) composites as electrode materials have been successfully synthesized by chemically depositing manganese dioxide (MnO2) on nanoporous CuAg bimetal (NP-CuAg). NP-CuAg can be produced by chemical dealloying the Cu-Zr-Ag metallic glasses. The phases and microstructures of NP-CuAg and NP-CuAg/MnO2 composite materials were examined by XRD and SEM. The electrochemical properties of the NP-CuAg/MnO2 composite electrode materials were investigated by cyclic voltammetry and galvanostatic charge-discharge measurements. For the NP-CuAg-supported MnO2 composites, the MnO2 nanoflakes are deposited on the surface of the NP-CuAg substrate. Owing to the three dimensional continuous nanoporous structure and excellent electrical conductivity of NP-CuAg, the MnO2 nanoflakes can produce much larger surface area as compared to its aggregate particles. Moreover, the NP-CuAg/MnO2 composite materials exhibit higher electrical conductivity than the NPC/MnO2 composite materials. Thus, the utilization of MnO2 surface active sites is improved, which leads to the higher specific capacitance. The specific capacitance increases with the increase of the Ag content in the precursor alloy. Cu45Zr45Ag10 ribbon after dealloying in 0.1 M HF for 10 h, the specific capacitance reaches to 392.86 F/g. The button type energy storage device encapsulated by the NP-CuAg/MnO2 composite electrode materials, is able to light on the LED.
作者单位E-mail
王晗 河北工业大学 材料科学与工程学院 wanghan0603@163.com 
李曼 河北工业大学 材料科学与工程学院  
许海媚 河北工业大学 材料科学与工程学院  
祝江赛 河北工业大学 材料科学与工程学院  
王志峰 河北工业大学 材料科学与工程学院  
秦春玲 河北工业大学 材料科学与工程学院 clqin@hebut.edu.cn 
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