化工进展 ›› 2019, Vol. 38 ›› Issue (02): 979-986.doi: 10.16085/j.issn.1000-6613.2018-0832

• 材料科学与技术 • 上一篇    下一篇

细乳液法制备MnO2/PPy复合材料及其电化学性能

梁芳楠(),刘志伟,张宁,刘有智()   

  1. 1. 中北大学超重力化工过程山西省重点实验室,山西 太原 030051
  • 收稿日期:2018-04-23 修回日期:2018-11-07 出版日期:2019-02-05 发布日期:2019-05-27
  • 通讯作者: 刘有智 E-mail:lfnzch@126.com;lyzzhongxin@126.com
  • 作者简介:<named-content content-type="corresp-name">梁芳楠</named-content>(1990—),女,博士研究生,研究方向为化工过程强化。E-mail:<email>lfnzch@126.com</email>。|刘有智,教授,博士生导师,研究方向为超重力化工过程与技术。E-mail:<email>lyzzhongxin@126.com</email>。
  • 基金资助:
    山西省研究生教育创新项目(2017BY113);国家自然科学基金(21706245)

Synthesis of MnO2/PPy composite materials by miniemulsion polymerization and its electrochemical performances

Fangnan LIANG(),Zhiwei LIU,Ning ZHANG,Youzhi LIU()   

  1. 1. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, Shanxi, China
  • Received:2018-04-23 Revised:2018-11-07 Online:2019-02-05 Published:2019-05-27
  • Contact: Youzhi LIU E-mail:lfnzch@126.com;lyzzhongxin@126.com

摘要:

以吡咯(Py)、高锰酸钾(KMnO4)等为原料,撞击流-旋转填料床(IS-RPB)为乳化设备,通过细乳液法(W/O)制备了类球形花状结构的MnO2/PPy复合材料。研究了对甲苯磺酸浓度、高锰酸钾浓度和反应时间对MnO2/PPy复合材料比容量的影响,并对其电化学性能进行了考察。研究结果表明,细乳液法制备MnO2/PPy复合材料适宜条件为对甲苯磺酸浓度0.84mol/L、高锰酸钾浓度0.094mol/L及反应时间3.5h。该条件下制备的MnO2/PPy复合材料比表面积为177.1m2/g,比容量在0.5A/g时达到231.9F/g。同时,也表明MnO2与PPy的协同作用有效提高了MnO2/PPy的比容量和循环稳定性。

关键词: 细乳液, 二氧化锰/聚吡咯, 撞击流-旋转填料床, 电化学性能, 比容量

Abstract:

The MnO2/PPy composite materials were prepared by miniemulsion method (W/O) with Py and KMnO4 as raw materials, which obtained spherical floral structure. The impinging stream-rotating packed bed (IS-RPB) was selected as an emulsion equipment to prepare miniemulsion. The concentration of p-toluenesulfonic acid, concentration of potassium permanganate and reaction time on the specific capacitance of MnO2/PPy composite materials were studied. And the electrochemical performances were investigated also. The results showed that the optimum conditions of synthesis MnO2/PPy composite materials by miniemulsion polymerization were concentration of p-toluenesulfonic acid of 0.84mol/L, concentration of potassium permanganate of 0.094mol/L and reaction time of 3.5h. Under the suitable operating conditions, the specific surface area of MnO2/PPy composite materials was 177.1m2/g and the specific capacitance was 231.9F/g at 0.5A/g. The specific capacitance and cycle stability of MnO2/PPy electrode were enhanced due to synergistic effect between MnO2 and PPy.

Key words: miniemulsion, manganese bioxide/polypyrrole, impinging stream-rotating packed bed, electrochemical performances, specific capacitance

中图分类号: 

  • TQ050.4