考虑离聚物膨胀的质子交换膜水电解槽 建模与性能优化

打开文本图片集

中图分类号：TM911.4 DOI：10. 16152/j. cnki. xdxbzr. 2025-06-007

Modelling and performance optimisation of proton exchange membrane water electrolyzer considering ionomer swelling

ZHANG Jianfei， XU Yong，QU Zhiguo （MOE Key Laboratory of Thermo-Fluid Science and Engineering， School of Energy and Power Engineering，Xi'an Jiaotong University，Xi’an 71OO49，China）

Abstract Proton exchange membrane water electrolyzer decomposes water into oxygen and hydrogen using electrical energy as the driving force. During the water electrolysis process，the anode catalyst layer is a key factor influencing the performance of the electrolyzer.Based on the initial structural parameters of the proton exchange membrane water electrolyzer，this study establishes a one-dimensional electrolysis model to investigate the efect of ionomers in the anode catalyst layer on the operational performance of electrolyzer.Six ionomers with diferent equivalent weights，including both long-chain and short-chain types，were compared.Proton conductivity of ionomers was corrected based on their equivalent weights，and interfacial contact resistance at different ionomer contents was calculated using the constriction resistance theory.Since excessve ionomer in the catalyst layer can cover the active sites of catalyst，there exists an optimal ionomer content in the anode catalyst layer.When using diffrent types of ionomers，the optimal ionomer content varies due to differences in water absorption，which is related to the porosity of the catalyst layer after ionomer water absorption and swelling.Based on this，a formula related to the optimal porosity is proposed in this paper.Furthermore，the performance of short-chain ionomer consistentlyoutperforms thatof long-chain ionomerboth before and after water absorption and sweling，which demonstrates the advantages of short-chain ionomers.This study can provide references for the optimal design of catalyst layer in proton exchange membrane water electrolyzer.

Keywordselectrolysis of water；proton exchange membrane water electrolyzer；anode catalytic layer; iono. mer swelling

氢能作为清洁、高效、多功能的能源载体，其优势贯穿能源属性、应用场景与环境效益等多个维度，既契合“双碳”目标下的能源转型需求，也能有效弥补传统能源的诸多短板。（剩余18309字）