无机材料学报 ›› 2013, Vol. 28 ›› Issue (3): 341-346.DOI: 10.3724/SP.J.1077.2012.12474 CSTR: 32189.14.SP.J.1077.2012.12474

• 研究快报 • 上一篇    

水热法合成锌空气电池氧还原二氧化锰催化剂

黄幼菊1, 李伟善1,2,3   

  1. (华南师范大学 1. 化学和环境学院; 2. 广东高校电化学储能与发电技术重点实验室; 3. 教育部电化学储能材料与技术工程研究中心, 广州510006)
  • 收稿日期:2012-08-07 修回日期:2012-10-30 出版日期:2013-03-20 网络出版日期:2013-02-20
  • 作者简介:黄幼菊. E-mail: youjuhuang@163.com
  • 基金资助:

    National Natural Science Foundation of China (20873046); Natural Science Foundation of Guangdong Province (10351063101000001)

Preparation of Manganese Dioxide for Oxygen Reduction in Zinc Air Battery by Hydro thermal Method

HUANG You-Ju1, LI Wei-Shan1,2,3   

  1. (1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China; 2. Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China; 3. Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, China)
  • Received:2012-08-07 Revised:2012-10-30 Published:2013-03-20 Online:2013-02-20
  • About author:HUANG You-Ju (1980–), female, candidate of PhD. E-mail: youjuhuang@163.com
  • Supported by:

    National Natural Science Foundation of China (20873046); Natural Science Foundation of Guangdong Province (10351063101000001)

摘要: 在180℃下通过改变K+与H+摩尔比使用水热法分别制备了δ-MnO2, α-MnO2和β-MnO2 纳米颗粒, K+与H+摩尔比分别为3.4、0.85和0.24。所合成的样品通过扫描电子显微镜(SEM), 粉末X射线衍射(XRD), 傅里叶变换红外光谱(FTIR), BET比表面分析, 热重分析(TG)和电化学方法表征。结果表明: K+与H+的浓度对产品的晶型、形貌以及比表面积有很大影响; 将这三种材料作为锌空电池的阴极材料时, δ-MnO2与α-MnO2的电化学性能明显优于β-MnO2. 在–0.35 V下, δ-MnO2、α-MnO2和β-MnO2的氧还原电流分别为56.28、56.01和40.88 mA/cm2

关键词: 氧还原, 二氧化锰, 水热方法, 锌空电池

Abstract: δ-MnO2, α-MnO2 and β-MnO2 nano-particles were obtained by a hydrothermal method with changing molar ratios of K+/H+ at low temperature of 180℃, and the molar ratios of K+/H+ were 3.4, 0.85 and 0.24, respectively. The as-prepared samples were characterized by SEM, XRD, FTIR, BET, TG and electrochemical method. The results indicate that the concentrations of K+ ion and H+ ion have great effects on the crystalline structures, morphology and specific surface area of the as-prepared products. Among the three as-prepared samples used as cathodic materials in zinc air battery, the rate performances of the δ-MnO2 and α-MnO2 are superior to that of the as-prepared β-MnO2. The oxygen reduction currents of δ-MnO2, α-MnO2, and β-MnO2 at –0.35 V are 56.28, 56.01 and 40.88 mA/cm2, respectively.

Key words: oxygen reduction, manganese dioxide, hydro thermal method, zinc air battery

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