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DOE OSTI · 1777167

Cation Additive Enabled Rechargeable LiOH-Based Lithium–Oxygen Batteries

Bi, Xuanxuan·Li, Matthew·Liu, Cong·Yuan, Yifei·Wang, Hao·Key, Baris·Wang, Rongyue·Shahbazian‐Yassar, Reza·Curtiss, Larry A.·Lu, Jun·Amine, Khalil
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Abstract

Lithium-oxygen (Li-O 2 ) batteries have attracted extensive research interest due to their high energy density. Other than Li 2 O 2 (a typical discharge product in Li-O 2 batteries), LiOH has proved to be electrochemically active as an alternative product. Here we report a simple strategy to achieve a reversible LiOH-based Li-O 2 battery by using a cation additive, sodium ions, to the lithium electrolyte. Without redox mediators in the cell, LiOH is detected as the sole discharge product and it charges at a low charge potential of 3.4 V. A solution-based reaction route is proposed, showing that the competing solvation environment of the catalyst and Li+ leads to LiOH precipitation at the cathode. It is critical to tune the cell chemistry of Li-O 2 batteries by designing a simple system to promote LiOH formation/decomposition.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYLiOHcation additivelithium air batterieslithium hydroxidelithium oxygen batteries

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Bi, Xuanxuan, Li, Matthew, Liu, Cong, Yuan, Yifei, Wang, Hao, Key, Baris, Wang, Rongyue, Shahbazian‐Yassar, Reza, Curtiss, Larry A., Lu, Jun, Amine, Khalil. 2020-10-05. Cation Additive Enabled Rechargeable LiOH-Based Lithium–Oxygen Batteries. https://doi.org/10.1002/anie.202010745

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