The Effect of Supply Rate of Li Ion and Anion on Li Dissolution/Deposition Behavior in LiNO3 Electrolyte Solutions for Li-Air Batteries

Although Li-air batteries (LAB) have a high theoretical energy density (3500 Wh kg−1), further developments are required to overcome their practical limitations. Regarding the Li-metal negative electrode (NE), we have previously reported on the reversibility of the Li dissolution/deposition reaction...

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Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2024/04/20, Vol.92(4), pp.047003-047003
Main Authors: OZAWA, Fumisato, KOYAMA, Kazuki, IWASAKI, Daiki, AZUMA, Shota, NOMURA, Akihiro, SAITO, Morihiro
Format: Article
Language:eng ; jpn
Subjects:
Atmosphere
Batteries
Current density
Deposition
Dissolution
Electrodes
Electrolytes
Electrolytic cells
Li Dissolution/deposition
Li Metal Anode
Li-air Battery (LAB)
LiNO3 Electrolyte Solution
Lithium oxides
Metal air batteries
Metals
Photoelectron spectroscopy
Photoelectrons
Scanning electron microscopy
X ray photoelectron spectroscopy
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container_title Denki kagaku oyobi kōgyō butsuri kagaku
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creator OZAWA, Fumisato
KOYAMA, Kazuki
IWASAKI, Daiki
AZUMA, Shota
NOMURA, Akihiro
SAITO, Morihiro
description Although Li-air batteries (LAB) have a high theoretical energy density (3500 Wh kg−1), further developments are required to overcome their practical limitations. Regarding the Li-metal negative electrode (NE), we have previously reported on the reversibility of the Li dissolution/deposition reaction by using Li|Li symmetric cells with a tetraglyme (G4)-based electrolytic solution. Particularly, in the 1.0 M (= mol L−1) LiNO3/G4 electrolyte under an O2 atmosphere, a Li2O protective layer is efficiently formed on the Li-metal electrode at a current density of 0.40 mA cm−2, and Li dendrite formation is suppressed. In the present study, we expanded the test conditions (current densities up to 2.0 mA cm−2 and temperatures of 10 to 50 °C) to clarify the dissolution/deposition behavior of the Li-metal NE. The effects of two electrolyte solutions, namely LiTFSI/G4 and LiNO3/G4, on the Li-metal NE were evaluated based on cyclical testing using Li|Li symmetric cells under an O2 atmosphere. The NEs were also examined by scanning electron microscopy and X-ray photoelectron spectroscopy. The results indicated that not only LiNO3 salt but also the supply of Li and nitrate ions at the Li electrode surface are critical factors in LAB performance.
doi_str_mv 10.5796/electrochemistry.23-00142
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Regarding the Li-metal negative electrode (NE), we have previously reported on the reversibility of the Li dissolution/deposition reaction by using Li|Li symmetric cells with a tetraglyme (G4)-based electrolytic solution. Particularly, in the 1.0 M (= mol L−1) LiNO3/G4 electrolyte under an O2 atmosphere, a Li2O protective layer is efficiently formed on the Li-metal electrode at a current density of 0.40 mA cm−2, and Li dendrite formation is suppressed. In the present study, we expanded the test conditions (current densities up to 2.0 mA cm−2 and temperatures of 10 to 50 °C) to clarify the dissolution/deposition behavior of the Li-metal NE. The effects of two electrolyte solutions, namely LiTFSI/G4 and LiNO3/G4, on the Li-metal NE were evaluated based on cyclical testing using Li|Li symmetric cells under an O2 atmosphere. The NEs were also examined by scanning electron microscopy and X-ray photoelectron spectroscopy. 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ispartof Electrochemistry, 2024/04/20, Vol.92(4), pp.047003-047003
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source J-STAGE Free
subjects Atmosphere
Batteries
Current density
Deposition
Dissolution
Electrodes
Electrolytes
Electrolytic cells
Li Dissolution/deposition
Li Metal Anode
Li-air Battery (LAB)
LiNO3 Electrolyte Solution
Lithium oxides
Metal air batteries
Metals
Photoelectron spectroscopy
Photoelectrons
Scanning electron microscopy
X ray photoelectron spectroscopy
title The Effect of Supply Rate of Li Ion and Anion on Li Dissolution/Deposition Behavior in LiNO3 Electrolyte Solutions for Li-Air Batteries
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