Regulating Water Transport Paths on Porous Transport Layer by Hydrophilic Patterning for Highly Efficient Unitized Regenerative Fuel Cells  

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作  者:Sung Min Lee Keun Hwan Oh Hwan Yeop Jeong Duk Man Yu Tae-Ho Kim 

机构地区:[1]Hydrogen Energy Research Center,Korea Research Institute of Chemical Technology(KRICT),141 Gajeong-ro,Yuseong-gu,Daejeon 305-600,Republic of Korea

出  处:《Nano-Micro Letters》2025年第8期264-277,共14页纳微快报(英文版)

基  金:supported by the Korea Research Institute of Chemical Technology Core Research Program funded by the Ministry of Science&ICT(MSIT,Republic of Korea)(No.KS2522-20);This work was also supported by the Program of the National Research Foundation(NRF)funded by the MSIT(No.2022M3H4A3A01083536 and RS-2024-00466554).

摘  要:While unitized regenerative fuel cells(URFCs)are promising for renewable energy storage,their efficient operation requires simultaneous water management and gas transport,which is challenging from the standpoint of water management.Herein,a novel approach is introduced for examining the alignment hydrophilic pattern of a Ti porous transport layer(PTL)with the flow field of a bipolar plate(BP).UV/ozone patterning and is employed to impart amphiphilic characteristics to the hydrophobic silanized Ti PTL,enabling low-cost and scalable fabrication.The hydrophilic pattern and its alignment with the BP are comprehensively analyzed using electrochemical methods and computational simulations.Notably,the serpentine-patterned(SP)Ti PTL,wherein the hydrophilic channel is directly aligned with the serpentine flow field of the BP,effectively enhances oxygen removal in the water electrolyzer(WE)mode and mitigates water flooding in the fuel cell(FC)mode,ensuring uninterrupted water and gas flow.Further,URFCs with SP configuration exhibit remarkable performance in the WE and FC modes,achieving a significantly improved round-trip efficiency of 25.7%at 2 A cm^(−2).

关 键 词:URFE Fuel cell Water electrolysis Surface modification Hydrophilic-patterned Ti PTL 

分 类 号:TM911.4[电气工程—电力电子与电力传动]

 

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