Improved electrical power production of thermally regenerative batteries using a poly(phenylene oxide) based anion exchange membrane

JOURNAL OF POWER SOURCES

卷:342

Article

Rahimi, Mohammad¹  Zhu, Liang²  Kowalski, Kelly L.¹  Zhu, Xiuping^3,4  Gorski, Christopher A.³  Hickner, Michael A.^1,2,5  Logan, Bruce E.³ 

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

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

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

[4] Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA

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

关键词: Waste heat;    Thermally regenerative battery;    Anion exchange membrane;    Energy harvesting;    Thermal efficiency;   

DOI  :  10.1016/j.jpowsour.2017.01.003

来源: Elsevier

【 摘 要 】

Thermally regenerative ammonia-based batteries (TRABs) can be used to harvest low-grade waste heat as electrical power. To improve TRAB performance, a series of benzyltrimethyl quaternary ammoniumfunctionalized poly(phenylene oxide) anion exchange membranes (BTMA-AEMs) were examined for their impact on performance relative to a commercial AEM (Selemion AMV). The synthesized AEMs had different degrees of functionalization (DF; 25% and 40%), and thicknesses (50, 100 and 150 mu m). Power and energy densities were shown to be a function of both DF and membrane thickness. The power density of TRAB increased by 31% using a BTMA-AEM (40% DF, 50 mu m thick; 106 +/- 7 W m(-2)) compared to the Selemion (81 +/- 5 W m(-2)). Moreover, the energy density increased by 13% when using a BTMA-based membrane (25% DF, 150 mu m thick; 350 Wh m-3) compared to the Selemion membrane (311 Wh m(-3)). The thermal-electric conversion efficiency improved to 0.97% with the new membrane compared to 0.86% for the Selemion. This energy recovery was 7.0% relative to the Carnot efficiency, which was 1.8 times greater than the highest previously reported value of a system used to capture low-grade waste heat as electricity. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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