Power generation enhancement of a membrane-free thermally regenerative battery induced by the density difference of electrolytes

Yu Shi, Dong Li, Yichao An, Liang Zhang, Jun Li, Qian Fu, Xun Zhu and Qiang Liao

Applied Energy, 2023, vol. 344, issue C, No S0306261923006669

Abstract: The development of a low-cost and high-performance thermally regenerative battery is an extremely effective way for waste heat recovery. In this work, a membrane-free thermally regenerative battery (M−TRB) is designed for low-cost and high-performance low-grade thermal energy harvesting. It is exhibited that a M−TRB with a virtual membrane formed by the interface between electrolytes instead of the expensive anion exchange membrane (AEM) can achieve stable power generation successfully. And the maximum power density obtained in M−TRB is 118 W m−2 under the optimal operation condition. Moreover, a combination of M−TRB and hierarchical porous composite electrodes (PCEs) can further improve the maximum power density to 220 W m−2. The much lower cost caused by the simple structure without expensive AEM makes it more competitive in comparison to other TRBs. This indicated that the high-performance and low-cost M−TRB is a potential choice for the construction of systems in future applications.

Keywords: Thermally regenerative battery; Membrane-free structure; Low-grade thermal energy recovery; Density difference; Maximum power density (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (1)

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DOI: 10.1016/j.apenergy.2023.121302

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