Durability of anion exchange membrane water electrolyzers,Energy & Environmental Science

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Durability of anion exchange membrane water electrolyzers
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2021-4-27 , DOI: 10.1039/d0ee04086j
Dongguo Li _{1,

2,

3,

4} , Andrew R. Motz _{4,

5,

6} , Chulsung Bae _{4,

7,

8,

9} , Cy Fujimoto _{4,

10,

11,

12} , Gaoqiang Yang _{13,

14,

15,

16,

17} , Feng-Yuan Zhang _{13,

14,

15,

16,

17} , Katherine E. Ayers _{4,

5,

6} , Yu Seung Kim _{1,

2,

3,

4}

Affiliation

MPA-11: Materials Synthesis & Integrated Devices
Los Alamos National Laboratory
Los Alamos
USA
Nel Hydrogen
Wallingford
Department of Chemistry and Chemical Biology
Rensselaer Polytechnic Institute
Troy
Nanoscale Science Department
Sandia National Laboratories
Albuquerque
Department of Mechanical
Aerospace & Biomedical Engineering
UT Space Institute
University of Tennessee
Knoxville

Interest in the low-cost production of clean hydrogen is growing. Anion exchange membrane water electrolyzers (AEMWEs) are considered one of the most promising sustainable hydrogen production technologies because of their ability to split water using platinum group metal-free catalysts, less expensive anode flow fields, and bipolar plates. Critical to the realization of AEMWEs is understanding the durability-limiting factors that restrict the long-term use of these devices. This article presents both durability-limiting factors and mitigation strategies for AEMWEs under three operation modes, i.e., pure water-fed (no liquid electrolyte), concentrated KOH-fed, and 1 wt% K₂CO₃-fed operating at a differential pressure of 100 psi. We examine extended-term behaviors of AEMWEs at the single-cell level and connect their behavior with the electrochemical, chemical, and mechanical instability of single-cell components. Finally, we discuss the pros and cons of AEMWEs under these operation modes and provide direction for long-lasting AEMWEs with highly efficient hydrogen production capabilities.

中文翻译：

阴离子交换膜水电解槽的耐用性

对低成本生产清洁氢气的兴趣正在增长。阴离子交换膜水电解器（AEMWEs）被认为是最有希望的可持续制氢技术之一，因为它们具有使用不含铂族金属的催化剂，较便宜的阳极流场和双极板分解水的能力。实现AEMWE的关键是要了解限制这些设备长期使用的耐用性限制因素。本文介绍了三种操作模式下AEMWE的耐久性限制因素和缓解策略，即纯水喂养（无液体电解质），浓KOH喂养和1 wt％K ₂ CO ₃三种操作模式-fed在100 psi的压差下运行。我们检查了单电池水平上AEMWE的长期行为，并将其行为与单电池组件的电化学，化学和机械不稳定性联系起来。最后，我们讨论了在这些操作模式下AEMWE的优缺点，并为具有高效制氢能力的持久AEMWE提供了方向。

更新日期：2021-05-05

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