Development of a membrane-less microfluidic thermally regenerative ammonia-based battery towards small-scale low-grade thermal energy recovery

Shi, Yu; Li, Yanxiang; Zhang, Liang; Li, Jun; Fu, Qian; Zhu, Xun; Liu, Qiang

doi:10.1016/j.apenergy.2022.119976

Cited by 11 publications

(3 citation statements)

References 40 publications

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“…The previous study reported a kind of membraneless TRABs using copper electrodes and a virtual membrane formed by the colaminar flow of the catholyte and anolyte could also avoid the crossover of reactants, achieving a stable power generation. 28 It was obvious that the battery cost was significantly reduced due to the removal of expensive anion-exchange membranes. However, pumps for the electrolyte flow were used in membraneless TRABs and additional pump power input would increase the operation cost and make the systems more complicated.…”

Section: Introductionmentioning

confidence: 99%

“…With respect to the reduction of the cost, membraneless TRABs are promising for application. The previous study reported a kind of membraneless TRABs using copper electrodes and a virtual membrane formed by the colaminar flow of the catholyte and anolyte could also avoid the crossover of reactants, achieving a stable power generation . It was obvious that the battery cost was significantly reduced due to the removal of expensive anion-exchange membranes.…”

Section: Introductionmentioning

confidence: 99%

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A Low-Cost Self-Pumping Membraneless Thermally Regenerative Flow Battery for Small-Scale Waste Heat Recovery

Jiang,

Shi,

et al. 2024

Ind. Eng. Chem. Res.

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The all-aqueous thermally regenerative battery has the advantages of high open-circuit voltage, high power density, and high Coulombic efficiency, providing a promising way for low-temperature waste heat recovery. In this study, a passive membraneless thermally regenerative flow battery driven by capillary force and gravity is proposed to reduce the cost of construction and operation. The feasibility of power generation and the influence of key parameters (height difference, support electrolyte concentration, etc.) on the battery performance are studied. The results showed that a laminar flow induced by a fiber-based microfluidic reactor could effectively separate the catholytes and anolytes, and the battery could achieve long-term power production and obtain a maximum power density of 15.2 mW cm −2 . The performance of the battery first increased and then decreased with the inlet height, and the optimal height was 3 mm. This is mainly due to the fact that the inlet height affects the flow rate of the electrolyte, which affects the mass transfer and laminar flow effect in the porous electrode. Within a certain range, as the concentration of the supporting electrolyte increases, the conductivity of the electrolyte is significantly improved, although the flow rate decreases to a certain extent due to the increase in viscosity, resulting in a further improvement in the battery performance. Through the above optimization, the maximum power density of the battery obtained in this study is 24.9 mW cm −2 , and the maximum theoretical thermal efficiency can reach 1.26% (the relative Carnot efficiency can reach 10.6%).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low-Cost Self-Pumping Membraneless Thermally Regenerative Flow Battery for Small-Scale Waste Heat Recovery

Jiang,

Shi,

et al. 2024

Ind. Eng. Chem. Res.

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“…Thus, the actual heat-to-electricity conversion efficiency of the TRB system is closely related to the power generation performance obtained in the batteries. Since TRBs were first proposed, a lot of studies have been performed to improve the power generation performance, which mainly includes the investigation of reactor design, − reactive systems, ,, and electrode development. − Given the electrochemical reaction occurring in the interface between electrolyte and electrode, there is a simple and effective method to improve the power generation performance by developing high-performance electrodes. In previous studies, hierarchical porous surface Cu@Ni electrodes and biomass waste-derived porous composite electrodes were proposed to improve the electrolyte/electrode interface and obtained the maximum power density of 10.2 mW cm –2 and 8.1 mW cm –2 , respectively.…”

mentioning

confidence: 99%

A Self-Stratified Thermally Regenerative Battery Using Nanoprism Cu Covering Ni Electrodes for Low-Grade Waste Heat Recovery

Shi

Zhang

et al. 2023

J. Phys. Chem. Lett.

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Developing a low-cost and high-performance thermally regenerative battery (TRB) is significant for recovering low-grade waste heat. A self-stratified TRB induced by the density difference between electrolytes is proposed to remove the commercial anion exchange membrane (AEM) and avoid ammonia crossover. The simulation and experiment results show the uneven distribution of NH3, verifying the feasibility of self-stratified electrolytes. For better power generation performance, nanoprism Cu covering Ni electrodes with a high specific surface area and a stable framework are adopted to provide more reaction active sites for fast charge transfer during discharge. A maximum power density (12.7 mW cm–2) and a theoretical heat-to-electricity conversion efficiency of 2.4% (relative to Carnot efficiency of 27.5%) are obtained in the self-stratified TRB employing nanoprism Cu covering Ni electrodes. Moreover, the cost-effectiveness, simple structure, and sustainable discharge operation indicate that it will be a potential choice for energy conversion from low-grade heat.

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

Shi,

Li,

et al. 2023

Applied Energy

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Development of a membrane-less microfluidic thermally regenerative ammonia-based battery towards small-scale low-grade thermal energy recovery

Cited by 11 publications

References 40 publications

A Low-Cost Self-Pumping Membraneless Thermally Regenerative Flow Battery for Small-Scale Waste Heat Recovery

A Low-Cost Self-Pumping Membraneless Thermally Regenerative Flow Battery for Small-Scale Waste Heat Recovery

A Self-Stratified Thermally Regenerative Battery Using Nanoprism Cu Covering Ni Electrodes for Low-Grade Waste Heat Recovery

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

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