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Design principles for enabling an anode-free sodium all-solid-state battery

Grayson Deysher, Jin An Sam Oh, Yu-Ting Chen, Baharak Sayahpour, So-Yeon Ham, Diyi Cheng, Phillip Ridley, Ashley Cronk, Sharon Wan-Hsuan Lin, Kun Qian, Long Hoang Bao Nguyen, Jihyun Jang () and Ying Shirley Meng ()
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Grayson Deysher: University of California San Diego
Jin An Sam Oh: University of California San Diego
Yu-Ting Chen: University of California San Diego
Baharak Sayahpour: University of California San Diego
So-Yeon Ham: University of California San Diego
Diyi Cheng: University of California San Diego
Phillip Ridley: University of California San Diego
Ashley Cronk: University of California San Diego
Sharon Wan-Hsuan Lin: University of California San Diego
Kun Qian: University of California San Diego
Long Hoang Bao Nguyen: University of California San Diego
Jihyun Jang: University of California San Diego
Ying Shirley Meng: University of California San Diego

Nature Energy, 2024, vol. 9, issue 9, 1161-1172

Abstract: Abstract Anode-free batteries possess the optimal cell architecture due to their reduced weight, volume and cost. However, their implementation has been limited by unstable anode morphological changes and anode–liquid electrolyte interface reactions. Here we show that an electrochemically stable solid electrolyte and the application of stack pressure can solve these issues by enabling the deposition of dense sodium metal. Furthermore, an aluminium current collector is found to achieve intimate solid–solid contact with the solid electrolyte, which allows highly reversible sodium plating and stripping at both high areal capacities and current densities, previously unobtainable with conventional aluminium foil. A sodium anode-free all-solid-state battery full cell is demonstrated with stable cycling for several hundred cycles. This cell architecture serves as a future direction for other battery chemistries to enable low-cost, high-energy-density and fast-charging batteries.

Date: 2024
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DOI: 10.1038/s41560-024-01569-9

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