Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (11): 20220420.doi: 10.7503/cjcu20220420

• Physical Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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