Impact of Cathode Current Collector on High Temperature PEM Water Electrolysis

Li, Hua; Inada, Akiko; Nakajima, Hironori; Ito, Kohei

doi:10.1149/06918.0003ecst

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…[27] As a result, the hydrogen gas can transfer into the flow channel with less resistance from the liquid water, and the concentration overvoltage caused by the transport of hydrogen gas is suppressed. [38]. Both the electrolysis voltage and the HFR decrease when the cathode current collector is changed from CC6 to CC4 (case2 and case3, respectively), which can be explained by their HFR difference.…”

Section: Methodsmentioning

confidence: 92%

Optimum structural properties for an anode current collector used in a polymer electrolyte membrane water electrolyzer operated at the boiling point of water

Fujigaya

Nakajima

et al. 2016

Journal of Power Sources

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This study attempts to optimize the properties of the anode current collector of a polymer electrolyte membrane water electrolyzer at high temperatures, particularly at the boiling point of water. Different titanium meshes (4 commercial ones and 4 modified ones) with various properties are experimentally examined by operating a cell with each mesh under different conditions. The average pore diameter, thickness, and contact angle of the anode current collector are controlled in the ranges of 10-35 µm, 0.2-0.3 mm, and 0-120°, respectively. These results showed that increasing the temperature from the conventional temperature of 80°C to the boiling point could reduce both the open circuit voltage and the overvoltages to a large extent without notable dehydration of the membrane. These results also showed that decreasing the contact angle and the thickness suppresses the electrolysis overvoltage largely by decreasing the concentration overvoltage. The effect of the average pore diameter was not evident until the temperature reached the boiling point. Using operating conditions of 100°C and 2 A/cm 2 , the electrolysis voltage is minimized to 1.69 V with a hydrophilic titanium mesh with an average pore diameter of 21 µm and a thickness of 0.2 mm.

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Section: Methodsmentioning

confidence: 92%

Optimum structural properties for an anode current collector used in a polymer electrolyte membrane water electrolyzer operated at the boiling point of water

Fujigaya

Nakajima

et al. 2016

Journal of Power Sources

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“…[22,55,[85][86][87][88][89]95,127,132,149] While the absence of recirculation on the cathode side was not observed to have an effect on the i-V curve at LT in the case of Ito et al, [150] other studies reported water accumulations in the cathode compartment giving rise to higher voltages. [151,152] Improved performances were in fact noted with nitrogen purging, which prevented water slug entrapments in the flow channel [153] or blockages closer to the membrane region. [88,152] Moreover, an optimal flowrate exists, which removes water to prevent blockage while not being itself a source for membrane dehydration.…”

Section: Operating Conditionsmentioning

confidence: 99%

Review and Prospects of PEM Water Electrolysis at Elevated Temperature Operation

Bonanno,

Müller,

Bensmann

et al. 2023

Adv Materials Technologies

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Polymer electrolyte membrane water electrolyzers (PEMWE) are currently restricted to an operating temperature range between 50 to 80 °C. This review shows that elevated temperature (ET) above 90 °C can be advantageous with respect to i) reduced cell voltages, ii) a reduction of catalyst loading or possibly the employment of less noble electrocatalysts, and iii) a greater potential for waste heat utilization when the electrolyzer is operated in exothermal mode (when the cell voltage is higher than the thermoneutral voltage). Together with presenting an overview of the materials and components utilized in elevated temperature PEMWE under liquid and steam operation, this article summarizes the experimental and modeling performances reported to date, highlights the challenges ahead, and suggests aspects, which will need to be considered to improve the performance at elevated temperature. Key points, which arise from this work are the extensive need of re‐assessing the material selection both for the cell components and also at a system level, the effects and optimization of working with steam operation, and in the long run, the need for techno‐economic analyses to ultimately assess whether efficiency gains will truly translate to a cost‐effective technology alternative.

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Effects of interfacial contact under different operating conditions in proton exchange membrane water electrolysis

Kang

Schuler²,

Chen³

et al. 2022

Electrochimica Acta

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Impact of Cathode Current Collector on High Temperature PEM Water Electrolysis

Cited by 5 publications

References 24 publications

Optimum structural properties for an anode current collector used in a polymer electrolyte membrane water electrolyzer operated at the boiling point of water

Optimum structural properties for an anode current collector used in a polymer electrolyte membrane water electrolyzer operated at the boiling point of water

Review and Prospects of PEM Water Electrolysis at Elevated Temperature Operation

Effects of interfacial contact under different operating conditions in proton exchange membrane water electrolysis

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