Cu/Ni composite electrodes for increased anodic coulombic efficiency and electrode operation time in a thermally regenerative ammonia-based battery for converting low-grade waste heat into electricity

Yu Shi, Liang Zhang, Jun Li, Qian Fu, Xun Zhu, Qiang Liao and Yongsheng Zhang

Renewable Energy, 2020, vol. 159, issue C, 162-171

Abstract: A Cu/Ni composite electrode is proposed for increasing the anodic coulombic efficiency and electrode operation time in thermally regenerative ammonia batteries (TRABs) used for converting low-grade waste heat into electrical power. The performance of a TRAB employing a Cu/Ni composite electrode (TRAB-Cu/Ni) is comparably studied, and the effects of the electroplating conditions are investigated. In comparison to the TRAB-Cu system, TRAB-Cu/Ni achieves similar maximum power (6.5 mW), but increased anodic coulombic efficiency (94%) and a significantly extended electrode operation time (>55 h). During electroplating, the structure of the composite electrode is influenced by the electroplating time and the concentrations of HEDP and Cu2+ in the electroplating baths. Optimal electroplating conditions for achieving maximum power (electroplating time of 60 min, HEDP concentration of 0.48 M, and Cu2+ concentration of 0.06 M) are also identified.

Keywords: Thermally regenerative ammonia-based battery; Composite electrode; Power generation; Coulombic efficiency; Electrode operation time (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:159:y:2020:i:c:p:162-171

DOI: 10.1016/j.renene.2020.05.147

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