Electrical power production from low-grade waste heat using a thermally regenerative ethylenediamine battery

JOURNAL OF POWER SOURCES

卷:351

Article

Rahimi, Mohammad¹  D'Angelo, Adriana²  Gorski, Christopher A.³  Scialdone, Onofrio²  Logan, Bruce E.³ 

[1] Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA

[2] Univ Palermo, Dipartimento Innovaz Ind & Digitale, Ingn Chim, Gestionale,Informat,Meccan, Viale Sci, I-90128 Palermo, Italy

[3] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA

关键词: Low-grade waste heat;    Thermally regenerative battery;    Ethylenediamine;    High power production;    Thermoelectrochemical systems;   

DOI  :  10.1016/j.jpowsour.2017.03.074

来源: Elsevier

【 摘 要 】

Thermally regenerative ammonia-based batteries (TRABs) have been developed to harvest low-grade waste heat as electricity. To improve the power production and anodic coulombic efficiency, the use of ethylenediamine as an alternative ligand to ammonia was explored here. The power density of the ethylenediamine-based battery (TRENB) was 85 +/- 3 W m(-2)-electrode area with 2 M ethylenediamine, and 119 +/- 4 W m(-2) with 3 M ethylenediamine. This power density was 68% higher than that of TRAB. The energy density was 478 Wh m(-3)-anolyte, which was similar to 50% higher than that produced by TRAB. The anodic coulombic efficiency of the TRENB was 77 +/- 2%, which was more than twice that obtained using ammonia in a TRAB (35%). The higher anodic efficiency reduced the difference between the anode dissolution and cathode deposition rates, resulting in a process more suitable for closed loop operation. The thermal-electric efficiency based on ethylenediamine separation using waste heat was estimated to be 0.52%, which was lower than that of TRAB (0.86%), mainly due to the more complex separation process. However, this energy recovery could likely be improved through optimization of the ethylenediamine separation process. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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