Exploring and understanding the internal voltage losses through catalyst layers in proton exchange membrane water electrolysis devices

Kang，Zhenye1; Wang，Hao2; Liu，Yanrong2; Mo，Jingke3; Wang，Min4; Li，Jing1; Tian，Xinlong1

2022-07-01

10.1016/j.apenergy.2022.119213

APPLIED ENERGY   影响因子和分区

0306-2619

Proton exchange membrane water electrolysis (PEMWE) technology has been regarded as one of the most promising ways to fulfill a sustainable energy system when coupled with renewable energies. Understanding the working mechanisms and losses in PEMWE devices is critical for achieving the desired performance and durability that targets wide commercial applications. This work demonstrates a novel four-wire sensing technique for acquiring the internal voltage losses in an operating PEMWE cell, which deconvolutes the total cell voltage into five parts. Most importantly, the ohmic resistances on anode and cathode catalyst layers are in-situ and operando measured. The two catalyst layer resistances show completely different values and trends under the same operating conditions, which is mainly due to the electrical conductivity difference between the two layers. The ohmic resistance of the anode catalyst shows an exponential decay with current density, which is in accordance with previously published visualization results, and shows a dependency on temperature; while the ohmic resistance of the cathode catalyst layer is a constant and not related to operating conditions. With the adoption of the technique, a phenomenon in which the ohmic resistance of the anode catalyst changes dynamically during the cell testing is captured and recorded for the first time. These findings provide very valuable data and results for understanding the catalyst layer working mechanisms, and also help to optimize the future catalyst layer. The four-wire sensing technique developed in this study is a promising tool for diagnosis, analysis, and optimization not only for PEMWE devices, but also potentially for other energy storage and conversion devices.

Catalyst layer resistance Internal loss Voltage deconvolution Water electrolysis

EI

英语

其他

20221812067360

Anodes ; Catalysts ; Cathodes ; Digital storage ; Electrolysis

Electron Tubes:714.1 ; Data Storage, Equipment and Techniques:722.1 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

ENGINEERING

2-s2.0-85129330375

Scopus

1.State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan Provincial Key Lab of Fine Chemistry,School of Chemical Engineering and Technology,Hainan University,Haikou,570228,China
2.Beijing Key Laboratory of Ionic Liquids Clean Process,CAS Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190,China
3.Department of Aeronautics and Astronautics,Fudan University,Shanghai,200433,China
4.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,Guangdong Province,518055,China

Kang，Zhenye,Wang，Hao,Liu，Yanrong,et al. Exploring and understanding the internal voltage losses through catalyst layers in proton exchange membrane water electrolysis devices[J]. APPLIED ENERGY,2022,317.

Kang，Zhenye.,Wang，Hao.,Liu，Yanrong.,Mo，Jingke.,Wang，Min.,...&Tian，Xinlong.(2022).Exploring and understanding the internal voltage losses through catalyst layers in proton exchange membrane water electrolysis devices.APPLIED ENERGY,317.

Kang，Zhenye,et al."Exploring and understanding the internal voltage losses through catalyst layers in proton exchange membrane water electrolysis devices".APPLIED ENERGY 317(2022).