Examination of graphene nanoplatelets as cathode materials for lithium-oxygen batteries by differential electrochemical mass spectrometry

Jung Eun Park; Gwang Hee Lee; Hyun Woo Shim; Dong Wook Kim; Yongku Kang; Dong Wan Kim

doi:10.1016/j.elecom.2015.05.004

Examination of graphene nanoplatelets as cathode materials for lithium-oxygen batteries by differential electrochemical mass spectrometry

Jung Eun Park, Gwang Hee Lee, Hyun Woo Shim, Dong Wook Kim, Yongku Kang, Dong Wan Kim

School of Civil, Environmental and Architectural Engineering

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

14 Citations (Scopus)

Abstract

In this study, in situ differential electrochemical mass spectrometry was employed to investigate the electrochemical rechargeability of two types of graphene nanoplatelets (GNPs) as electrode materials for lithium-oxygen batteries by evaluating oxygen efficiency as well as coulombic efficiency. GNPs having hydrophobic surfaces exhibit much higher specific capacity than those having hydrophilic surfaces. When lithium nitrate-N,N-dimethylacetamide (LiNO₃-DMAc) is used as the electrolyte, the lithium-oxygen battery exhibits a long cycle life, and unwanted side reactions are effectively suppressed. The LiNO₃-DMAc electrolyte is more stable than the lithium bis(trifluoromethane)sulfonamide-tetraethylene glycol dimethyl ether electrolyte, as evidenced by high O₂ evolution and low CO₂ evolution.

Original language	English
Pages (from-to)	39-42
Number of pages	4
Journal	Electrochemistry Communications
Volume	57
DOIs	https://doi.org/10.1016/j.elecom.2015.05.004
Publication status	Published - 2015 Aug 1

Keywords

Differential electrochemical mass spectrometry
Electrolytes
Graphene nanoplatelets
Li-oxygen batteries

ASJC Scopus subject areas

Electrochemistry

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10.1016/j.elecom.2015.05.004

Cite this

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title = "Examination of graphene nanoplatelets as cathode materials for lithium-oxygen batteries by differential electrochemical mass spectrometry",

abstract = "In this study, in situ differential electrochemical mass spectrometry was employed to investigate the electrochemical rechargeability of two types of graphene nanoplatelets (GNPs) as electrode materials for lithium-oxygen batteries by evaluating oxygen efficiency as well as coulombic efficiency. GNPs having hydrophobic surfaces exhibit much higher specific capacity than those having hydrophilic surfaces. When lithium nitrate-N,N-dimethylacetamide (LiNO3-DMAc) is used as the electrolyte, the lithium-oxygen battery exhibits a long cycle life, and unwanted side reactions are effectively suppressed. The LiNO3-DMAc electrolyte is more stable than the lithium bis(trifluoromethane)sulfonamide-tetraethylene glycol dimethyl ether electrolyte, as evidenced by high O2 evolution and low CO2 evolution.",

keywords = "Differential electrochemical mass spectrometry, Electrolytes, Graphene nanoplatelets, Li-oxygen batteries",

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language = "English",

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journal = "Electrochemistry Communications",

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T1 - Examination of graphene nanoplatelets as cathode materials for lithium-oxygen batteries by differential electrochemical mass spectrometry

AU - Park, Jung Eun

AU - Lee, Gwang Hee

AU - Shim, Hyun Woo

AU - Kim, Dong Wook

AU - Kang, Yongku

AU - Kim, Dong Wan

PY - 2015/8/1

Y1 - 2015/8/1

N2 - In this study, in situ differential electrochemical mass spectrometry was employed to investigate the electrochemical rechargeability of two types of graphene nanoplatelets (GNPs) as electrode materials for lithium-oxygen batteries by evaluating oxygen efficiency as well as coulombic efficiency. GNPs having hydrophobic surfaces exhibit much higher specific capacity than those having hydrophilic surfaces. When lithium nitrate-N,N-dimethylacetamide (LiNO3-DMAc) is used as the electrolyte, the lithium-oxygen battery exhibits a long cycle life, and unwanted side reactions are effectively suppressed. The LiNO3-DMAc electrolyte is more stable than the lithium bis(trifluoromethane)sulfonamide-tetraethylene glycol dimethyl ether electrolyte, as evidenced by high O2 evolution and low CO2 evolution.

AB - In this study, in situ differential electrochemical mass spectrometry was employed to investigate the electrochemical rechargeability of two types of graphene nanoplatelets (GNPs) as electrode materials for lithium-oxygen batteries by evaluating oxygen efficiency as well as coulombic efficiency. GNPs having hydrophobic surfaces exhibit much higher specific capacity than those having hydrophilic surfaces. When lithium nitrate-N,N-dimethylacetamide (LiNO3-DMAc) is used as the electrolyte, the lithium-oxygen battery exhibits a long cycle life, and unwanted side reactions are effectively suppressed. The LiNO3-DMAc electrolyte is more stable than the lithium bis(trifluoromethane)sulfonamide-tetraethylene glycol dimethyl ether electrolyte, as evidenced by high O2 evolution and low CO2 evolution.

KW - Differential electrochemical mass spectrometry

KW - Electrolytes

KW - Graphene nanoplatelets

KW - Li-oxygen batteries

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DO - 10.1016/j.elecom.2015.05.004

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JO - Electrochemistry Communications

JF - Electrochemistry Communications

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Examination of graphene nanoplatelets as cathode materials for lithium-oxygen batteries by differential electrochemical mass spectrometry

Abstract

Keywords

ASJC Scopus subject areas

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