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Cation Additive Enabled Rechargeable LiOH‐Based Lithium–Oxygen Batteries
Author(s) -
Bi Xuanxuan,
Li Matthew,
Liu Cong,
Yuan Yifei,
Wang Hao,
Key Baris,
Wang Rongyue,
ShahbazianYassar Reza,
Curtiss Larry A.,
Lu Jun,
Amine Khalil
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202010745
Subject(s) - lithium (medication) , electrolyte , battery (electricity) , chemistry , cathode , oxygen , redox , solvation , ion , inorganic chemistry , chemical engineering , electrode , organic chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
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.