Design of Large‐Scale Rectangular Cells for Rechargeable Seawater Batteries

Rechargeable seawater batteries (SWBs) are regarded as sustainable alternatives to Li‐ion batteries due to the use of an unlimited and free source of Na ion active materials. Although many approaches including the introduction of new catalysts have successfully improved the performance of SWBs, reco...

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Bibliographic Details
Published in:Advanced sustainable systems (Online) 2021-01, Vol.5 (1), p.n/a
Main Authors: Kim, Youngjin, Harzandi, Ahmad M., Lee, Jinho, Choi, Yunseok, Kim, Youngsik
Format: Article
Language:English
Subjects:
energy storage
NASICON
rechargeable seawater batteries
rectangular cells
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Summary:Rechargeable seawater batteries (SWBs) are regarded as sustainable alternatives to Li‐ion batteries due to the use of an unlimited and free source of Na ion active materials. Although many approaches including the introduction of new catalysts have successfully improved the performance of SWBs, reconsidering the cell design is an urgent requirement to improve the performance and scale up the production of practical batteries. In this study, by adjusting the maximum space efficiency, a rectangular cell is developed which due to its unique architecture, benefits from optimized contact to improve the overall charge transfer in the system. In view of the rigidity of the solid electrolyte, the novel cell model is intended to have adequate flexibility to be easily transported and practically utilized. Furthermore, the enhanced efficiency of the parallel stacked modules, indicates the capability of this cell in practical use. The designed catalyst‐free cell system shows a record capacity of 3.8 Ah (47.5 Ah kg−1), energy of 11 Wh (137.5 Wh kg−1), and peak power of 523 mW for individual unit cell, while it also retains performance up to 100 cycles. This design paves the way for commercializing rechargeable seawater batteries. A rectangular seawater battery comprised of anode and cathode compartments is illustrated. The high performance and stability of the cell is attributed not only to the effective space utilization but also to the enhanced ionic conductivity of the overall cell system. The stacked rectangular cells in a module show practical performance toward the commercialization of seawater batteries.
ISSN:2366-7486
2366-7486
DOI:10.1002/adsu.202000106