Oxygen-enriched electrolytes based on perfluorochemicals for high-capacity lithium-oxygen batteries

Yuki Nishikami; Toshihiro Konishi; Ryo Omoda; Yuichi Aihara; Kenichi Oyaizu; Hiroyuki Nishide

doi:10.1039/c5ta02219c

Oxygen-enriched electrolytes based on perfluorochemicals for high-capacity lithium-oxygen batteries

Yuki Nishikami, Toshihiro Konishi, Ryo Omoda, Yuichi Aihara, Kenichi Oyaizu^*, Hiroyuki Nishide

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Electrolytes highly enriched with oxygen for lithium-oxygen (Li-O₂) batteries were prepared by combining perfluorohexyl bromide as an oxygen-uptake perfluorochemical (PFC) medium with lithium perfluorooctane sulfonate (LiPFOS) as a perfluoro-surfactant and a supporting electrolyte, which allowed an exceptionally high miscibility of PFCs with tetraethylene glycol dimethyl ether (TEGDME). The electrochemical reduction current of oxygen was enhanced three times in the LiPFOS-TEGDME electrolyte with ca. 60 wt% PFC content in comparison with that of a conventional Li-O₂ battery electrolyte, which was ascribed to the high oxygen solubility of the electrolyte. A Li-O₂ cell fabricated with the PFC-based electrolyte exhibited an excellent discharging capacity of 6500 mA h g^-1 which was approximately 1.5 times higher than that obtained with the conventional electrolyte.

Original language	English
Pages (from-to)	10845-10850
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	20
DOIs	https://doi.org/10.1039/c5ta02219c
Publication status	Published - 2015 May 28

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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10.1039/c5ta02219c

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title = "Oxygen-enriched electrolytes based on perfluorochemicals for high-capacity lithium-oxygen batteries",

abstract = "Electrolytes highly enriched with oxygen for lithium-oxygen (Li-O2) batteries were prepared by combining perfluorohexyl bromide as an oxygen-uptake perfluorochemical (PFC) medium with lithium perfluorooctane sulfonate (LiPFOS) as a perfluoro-surfactant and a supporting electrolyte, which allowed an exceptionally high miscibility of PFCs with tetraethylene glycol dimethyl ether (TEGDME). The electrochemical reduction current of oxygen was enhanced three times in the LiPFOS-TEGDME electrolyte with ca. 60 wt% PFC content in comparison with that of a conventional Li-O2 battery electrolyte, which was ascribed to the high oxygen solubility of the electrolyte. A Li-O2 cell fabricated with the PFC-based electrolyte exhibited an excellent discharging capacity of 6500 mA h g-1 which was approximately 1.5 times higher than that obtained with the conventional electrolyte.",

author = "Yuki Nishikami and Toshihiro Konishi and Ryo Omoda and Yuichi Aihara and Kenichi Oyaizu and Hiroyuki Nishide",

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doi = "10.1039/c5ta02219c",

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T1 - Oxygen-enriched electrolytes based on perfluorochemicals for high-capacity lithium-oxygen batteries

AU - Nishikami, Yuki

AU - Konishi, Toshihiro

AU - Omoda, Ryo

AU - Aihara, Yuichi

AU - Oyaizu, Kenichi

AU - Nishide, Hiroyuki

PY - 2015/5/28

Y1 - 2015/5/28

N2 - Electrolytes highly enriched with oxygen for lithium-oxygen (Li-O2) batteries were prepared by combining perfluorohexyl bromide as an oxygen-uptake perfluorochemical (PFC) medium with lithium perfluorooctane sulfonate (LiPFOS) as a perfluoro-surfactant and a supporting electrolyte, which allowed an exceptionally high miscibility of PFCs with tetraethylene glycol dimethyl ether (TEGDME). The electrochemical reduction current of oxygen was enhanced three times in the LiPFOS-TEGDME electrolyte with ca. 60 wt% PFC content in comparison with that of a conventional Li-O2 battery electrolyte, which was ascribed to the high oxygen solubility of the electrolyte. A Li-O2 cell fabricated with the PFC-based electrolyte exhibited an excellent discharging capacity of 6500 mA h g-1 which was approximately 1.5 times higher than that obtained with the conventional electrolyte.

AB - Electrolytes highly enriched with oxygen for lithium-oxygen (Li-O2) batteries were prepared by combining perfluorohexyl bromide as an oxygen-uptake perfluorochemical (PFC) medium with lithium perfluorooctane sulfonate (LiPFOS) as a perfluoro-surfactant and a supporting electrolyte, which allowed an exceptionally high miscibility of PFCs with tetraethylene glycol dimethyl ether (TEGDME). The electrochemical reduction current of oxygen was enhanced three times in the LiPFOS-TEGDME electrolyte with ca. 60 wt% PFC content in comparison with that of a conventional Li-O2 battery electrolyte, which was ascribed to the high oxygen solubility of the electrolyte. A Li-O2 cell fabricated with the PFC-based electrolyte exhibited an excellent discharging capacity of 6500 mA h g-1 which was approximately 1.5 times higher than that obtained with the conventional electrolyte.

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Oxygen-enriched electrolytes based on perfluorochemicals for high-capacity lithium-oxygen batteries

Abstract

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UN SDGs

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