高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (11): 20220420.doi: 10.7503/cjcu20220420

• 物理化学 • 上一篇    下一篇

降低直接甲醇燃料电池浓差极化的含磺化碳管阻水夹层的构建

刘杰1,2, 李金晟1, 柏景森1,2, 金钊1(), 葛君杰1,2(), 刘长鹏1,2, 邢巍1,2()   

  1. 1.中国科学院长春应用化学研究所, 电分析化学国家重点实验室, 长春 130022
    2.中国科学技术大学应用化学与工程学院, 合肥 230026
  • 收稿日期:2022-06-14 出版日期:2022-11-10 发布日期:2022-07-11
  • 通讯作者: 金钊,葛君杰,邢巍 E-mail:zjin@ciac.ac.cn;gejj@ciac.ac.cn;xingwei@ciac.ac.cn
  • 基金资助:
    国家自然科学基金(21875243);吉林省科技发展计划项目(20200201001JC)

Constructing a Water-blocking Interlayer Containing Sulfonated Carbon Tubes to Reduce Concentration Polarization in Direct Methanol Fuel Cells

LIU Jie1,2, LI Jinsheng1, BAI Jingsen1,2, JIN Zhao1(), GE Junjie1,2(), LIU Changpeng1,2, XING Wei1,2()   

  1. 1.State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Changchun 130022,China
    2.School of Applied Chemical Engineering,University of Science and Technology of China,Hefei 230026,China
  • Received:2022-06-14 Online:2022-11-10 Published:2022-07-11
  • Contact: JIN Zhao,GE Junjie,XING Wei E-mail:zjin@ciac.ac.cn;gejj@ciac.ac.cn;xingwei@ciac.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(21875243);the Jilin Province Science and Technology Development Program, China(20200201001JC)

摘要:

采用直接接枝法, 将来自对氨基苯磺酸的苯磺酸官能团引入氧化多壁碳纳米管, 制得磺化多壁碳纳米管(SO3-MCNT). 再以SO3-MCNT为填料, 以Nafion离聚物为黏结剂, 利用超声喷涂在商业N212质子交换膜一侧构建了新的膜层, 获得了一种复合膜(SO3-MCNT?N212). 使用SO3-MCNT?N212制备燃料电池膜电极(MEA), 并用于直接甲醇燃料电池(DMFC)测试. 与使用普通N212膜的膜电极相比, 该膜电极的性能得到明显提升. 进一步分析表明, SO3-MCNT膜层的引入降低了阳极向阴极的跨膜水迁移作用, 缓解了阴极的水淹, 从而降低了浓差极化, 提升了膜电极的性能.

关键词: 直接甲醇燃料电池, 质子交换膜, 磺化多壁碳纳米管, 浓差极化, 水管理

Abstract:

The sulfonated multi-wall carbon nanotubes(SO3-MCNT) were prepared by introducing the benzenesulfonic acid functional group from 4-aminobenzenesulfonic acid into the oxidized multi-walled carbon nanotubes by a direct grafting method. The prepared sulfonated multi-walled carbon nanotubes were used as fillers and Nafion ionomer as binder to construct a new membrane layer upon one side of a commercial N212 proton exchange membrane using ultrasonic spraying, and then a composite membrane(SO3-MCNT?N212) was obtained. The com?posite membrane was used to prepare fuel cell membrane electrode assembly(MEA) for direct methanol fuel cell(DMFC) testing. Compared with the MEA samples using ordinary N212 membrane, the performance of this MEA has been significantly improved. Further analysis showed that the introduction of the sulfonated multi-walled carbon nanotube membrane layer is able to reduce the transmembrane water migration from the anode to the cathode, alleviate the cathode flooding, thereby reducing the concentration polarization and improving the performance of the MEA.

Key words: Direct methanol fuel cell, Proton exchange membrane, Sulfonated multi-walled carbon nanotubes, Concentration polarization, Water management

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