气候变化领域集成服务门户(CCPortal): Investigation of thin/well-tunable liquid/gas diffusion layers exhibiting superior multifunctional performance in low-temperature electrolytic water splitting

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DOI	10.1039/c6ee02368a
	Investigation of thin/well-tunable liquid/gas diffusion layers exhibiting superior multifunctional performance in low-temperature electrolytic water splitting
	Kang Z.; Mo J.; Yang G.; Retterer S.T.; Cullen D.A.; Toops T.J.; Green J.B.; Jr.; Mench M.M.; Zhang F.-Y.
发表日期	2017
ISSN	17545692
起始页码	166
结束页码	175
卷号	10 期号:1
英文摘要	Liquid/gas diffusion layers (LGDLs), which are located between the catalyst layer (CL) and bipolar plate (BP), play an important role in enhancing the performance of water splitting in proton exchange membrane electrolyzer cells (PEMECs). They are expected to transport electrons, heat, and reactants/products simultaneously with minimum voltage, current, thermal, interfacial, and fluidic losses. In this study, the thin titanium-based LGDLs with straight-through pores and well-defined pore morphologies are comprehensively investigated for the first time. The novel LGDL with a 400 μm pore size and 0.7 porosity achieved a best-ever performance of 1.66 V at 2 A cm-2 and 80°C, as compared to the published literature. The thin/well-tunable titanium based LGDLs remarkably reduce ohmic and activation losses, and it was found that porosity has a more significant impact on performance than pore size. In addition, an appropriate equivalent electrical circuit model has been established to quantify the effects of pore morphologies. The rapid electrochemical reaction phenomena at the center of the PEMEC are observed by coupling with high-speed and micro-scale visualization systems. The observed reactions contribute reasonable and pioneering data that elucidate the effects of porosity and pore size on the PEMEC performance. This study can be a new guide for future research and development towards high-efficiency and low-cost hydrogen energy. © The Royal Society of Chemistry 2017.
英文关键词	Temperature; Titanium; Electrochemical reactions; Electrolytic water splitting; Equivalent electrical circuit model; Multifunctional performance; Porosity and pore size; Proton exchange membranes; Research and development; Visualization system; Pore size; catalyst; diffusion; electrochemistry; hydrogen; low temperature; membrane; performance assessment; pore space; porosity; research and development; titanium; visualization
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190590
作者单位	Department of Mechanical, Aerospace and Biomedical Engineering, UT Space Institute, University of Tennessee, Knoxville, TN, United States; Oak Ridge National Lab., United States; Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, United States; National Renewable Energy Laboratory, United States
推荐引用方式 GB/T 7714	Kang Z.,Mo J.,Yang G.,et al. Investigation of thin/well-tunable liquid/gas diffusion layers exhibiting superior multifunctional performance in low-temperature electrolytic water splitting[J],2017,10(1).
APA	Kang Z..,Mo J..,Yang G..,Retterer S.T..,Cullen D.A..,...&Zhang F.-Y..(2017).Investigation of thin/well-tunable liquid/gas diffusion layers exhibiting superior multifunctional performance in low-temperature electrolytic water splitting.Energy & Environmental Science,10(1).
MLA	Kang Z.,et al."Investigation of thin/well-tunable liquid/gas diffusion layers exhibiting superior multifunctional performance in low-temperature electrolytic water splitting".Energy & Environmental Science 10.1(2017).