细乳液法制备MnO2/PPy复合材料及其电化学性能

doi:10.16085/j.issn.1000-6613.2018-0832

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

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. 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:2019-02-05
通讯作者: 刘有智
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. 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:2019-02-05
Contact: Youzhi LIU

摘要/Abstract

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

梁芳楠, 刘志伟, 张宁, 刘有智. 细乳液法制备MnO₂/PPy复合材料及其电化学性能[J]. 化工进展, 2019, 38(02): 979-986.

Fangnan LIANG, Zhiwei LIU, Ning ZHANG, Youzhi LIU. Synthesis of MnO₂/PPy composite materials by miniemulsion polymerization and its electrochemical performances[J]. Chemical Industry and Engineering Progress, 2019, 38(02): 979-986.

图/表 10

图1 IS-RPB制备细乳液的实验装置示意图

图2 MnO2/PPy复合材料形成过程示意图

图3 p-TSA浓度对MnO2/PPy复合材料比容量的影响

图4 KMnO4浓度对MnO2/PPy复合电极材料比容量的影响

图5 反应时间对MnO2/PPy复合电极材料比容量的影响

图6 材料形貌表征

图7 材料比表面积分析

图8 电极循环伏安曲线

图9 电极恒电流充放电曲线

图10 1A/g时MnO2和MnO2/PPy电极循环寿命曲线

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细乳液法制备MnO₂/PPy复合材料及其电化学性能

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

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