Engineered wettability-gradient porous structure enabling efficient water manipulation in regenerative fuel cells

IF 9.6 Q1 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE
Zhefei Pan , Lizhen Wu , Fengjia Xie , Zhewei Zhang , Zhen Zhao , Oladapo Christopher Esan , Xuming Zhang , Rong Chen , Liang An
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引用次数: 0

Abstract

Regenerative fuel cells can operate alternately as an electrolyzer and as a fuel cell, frequently involving water as a reactant or product. Modifying the electrode surface to manipulate water can prevent electrode flooding and enhance the electrode's mass transfer efficiency by facilitating better contact with gaseous reactants. However, conventional electrodes face difficulties in allowing water droplets to penetrate in a single direction leaving electrodes. In this work to address this issue, a wettability gradient electrode is designed and fabricated for efficient water manipulation in regenerative fuel cells. The findings demonstrate that the water removal strategy in the electrolyzer mode yields the highest ammonia yield and Faradaic efficiency of 3.39 × 10-10 mol s-1 cm-2 and 0.49 %, respectively. Furthermore, in the fuel cell mode, the discharging process sustains for approximately 20.5 h, which is six times longer than the conventional strategy. The ability to sustain the discharging process for extended periods is particularly advantageous in regenerative fuel cells, as it enables the cells to operate for longer periods without the need for regeneration.

Abstract Image

可在再生燃料电池中实现高效水处理的工程润湿梯度多孔结构
蓄热式燃料电池可交替作为电解器和燃料电池运行,通常以水作为反应物或产物。对电极表面进行改造以处理水,可以防止电极浸水,并通过促进电极与气态反应物更好地接触来提高传质效率。然而,传统电极很难让水滴从单一方向渗透离开电极。为解决这一问题,本研究设计并制造了一种润湿性梯度电极,用于再生燃料电池中的高效水处理。研究结果表明,在电解槽模式下,水去除策略可产生最高的氨产量和法拉第效率,分别为 3.39 × 10-10 mol s-1 cm-2 和 0.49 %。此外,在燃料电池模式下,放电过程可持续约 20.5 小时,是传统策略的六倍。延长放电过程的持续时间对于再生燃料电池尤为有利,因为它能使电池运行更长时间而无需再生。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Energy and AI
Energy and AI Engineering-Engineering (miscellaneous)
CiteScore
16.50
自引率
0.00%
发文量
64
审稿时长
56 days
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