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Title: How Low Can You Go? Nanoscale Membranes for Efficient Water Electrolysis

Journal Article · · ACS Energy Letters

Motivated by the need to lower the cost of hydrogen (H2) production by water electrolysis, significant research efforts are focused on making proton (H+) exchange membrane (PEM) water electrolyzers more efficient and capable of operating at higher current densities. These aims can be met by making H+-conducting membranes thinner, which has the effect of lowering ohmic drops across the membrane that represent the largest efficiency loss at high current densities (>2 A cm–2). However, decreasing membrane thickness below 50 μm is not trivial due to trade-offs between membrane resistance, H2 crossover (safety), membrane degradation, and manufacturing throughput. Furthermore, descriptions of key processes, limitations, and trade-offs that arise in thin membranes are provided that can be used to guide the design of ultrathin (i.e., submicron thick), low-resistance membrane materials that have the potential to transform the field of clean H2 production.

Research Organization:
Columbia University, New York, NY (United States); Forge Nano Inc., Thornton, CO (United States); Nel Hydrogen, Wallingford, CT (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AR0001567
OSTI ID:
3012601
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 4 Vol. 9; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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