Multilayered Anode Catalytic Electrode in High-Temperature Proton Exchange Membrane Fuel Cell

doi:10.11944/j.issn.1000-0518.2019.09.190034

Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (9): 1085-1090.DOI: 10.11944/j.issn.1000-0518.2019.09.190034

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Multilayered Anode Catalytic Electrode in High-Temperature Proton Exchange Membrane Fuel Cell

LIU Shiwei^a^b,LIANG Liang^a^b,LI Chenyang^a,LIU Changpeng^a,XING Wei^a(),DONG Xiandui^a^*()

^aState Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^bUniversity of Chinese Academy of Sciences,Beijing 100049,China

Received:2019-01-31 Accepted:2019-04-23 Published:2019-09-05 Online:2019-09-05
Contact: Xiandui DONG
Supported by:
Supported by the National Natural Science Foundation of China(No.21673221, No.21433003, No.U1601211), the Jilin Province Science and Technology Development Plan Project(No.20170203003SF), and the Key Deployment Program of CAS(No.KFZD-SW-412)

Abstract

Abstract:

High temperature proton exchange membrane fuel cell is a promising energy conversion device with the advantages of toxicity resistance and good stability. In this report, the multilayered catalytic structure was designed to improve anode electrode catalytic activity of fuel cell. Poly vinylidene fluoride co-hexafluoropropylene(PVDF-HFP) and polybenzimidazoles(PBI) are used as electrode binders to adjust the wettability of the diffusion electrode interface. The surface morphology and wettability of the electrode catalyst have been characterized. It was found that the porosity and roughness of the electrode layer were improved. The wettability distinction between layers(contact angles:149° for PVDF-HFP and 19° for PBI) was conducive to produce more stable three-phase reaction interfaces. The catalytic performance of fuel cells shows that the peak power density is enhanced by about 22%, and it has retained 82.1% and 71.4% in H₂ fuel containing CO at the concentrations of 10000 mg/m³ and 30000 mg/m³, respectively. It is concluded that the catalytic layer with such structure could increase the catalyst utilization and still maintain good toxic resistance to CO impurity inside fuel gas.

Key words: hydrogen electro-oxidation, phosphoric acid fuel cell, gas diffusion electrode, anti-poison, polybenzimidazoles membrane

LIU Shiwei, LIANG Liang, LI Chenyang, LIU Changpeng, XING Wei, DONG Xiandui. Multilayered Anode Catalytic Electrode in High-Temperature Proton Exchange Membrane Fuel Cell[J]. Chinese Journal of Applied Chemistry, 2019, 36(9): 1085-1090.

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Multilayered Anode Catalytic Electrode in High-Temperature Proton Exchange Membrane Fuel Cell

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