A dendrite-and oxygen-proof protective layer for lithium metal in lithium-oxygen batteries

Won Jin Kwak, Jiwon Park, Trung Thien Nguyen, Hun Kim, Hye Ryung Byon, Minchul Jang, Yang-Kook Sun

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

The problem of Li metal degradation, which leads to drastic side reactions, must be solved for improving the long-Term cycle performance of lithium-oxygen (Li-O 2 ) batteries. Recently, a number of methodologies have been proposed for Li metal surface protection, but evaluation of the stability of the protective materials is insufficient. Therefore, in this study, we fabricated an NCL (Nafion-based composite layer) as a mechanically and chemically stable protective layer for Li metal in Li-O 2 batteries. In addition, comparative experiments were conducted to investigate the mechanical and chemical stability of protective layers. Li-O 2 batteries using NCL-coated Li metal exhibited reversible oxygen reduction and evolution without any side reactions caused by reactive oxygen species that decompose chemically unstable protective materials. The NCL also exhibited effective mechanical strength which was verified with not only a Li stripping and plating test but also using a large scale Li-O 2 pouch cell which had has severe operating conditions with high current and capacity values.

Original languageEnglish
Pages (from-to)3857-3862
Number of pages6
JournalJournal of Materials Chemistry A
Volume7
Issue number8
DOIs
StatePublished - 2019 Jan 1

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Dendrites (metallography)
Lithium
Metals
Oxygen
Composite materials
Mechanical stability
Chemical stability
Plating
Strength of materials
Reactive Oxygen Species
Degradation
perfluorosulfonic acid
Experiments

Cite this

Kwak, Won Jin ; Park, Jiwon ; Nguyen, Trung Thien ; Kim, Hun ; Byon, Hye Ryung ; Jang, Minchul ; Sun, Yang-Kook. / A dendrite-and oxygen-proof protective layer for lithium metal in lithium-oxygen batteries. In: Journal of Materials Chemistry A. 2019 ; Vol. 7, No. 8. pp. 3857-3862.
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abstract = "The problem of Li metal degradation, which leads to drastic side reactions, must be solved for improving the long-Term cycle performance of lithium-oxygen (Li-O 2 ) batteries. Recently, a number of methodologies have been proposed for Li metal surface protection, but evaluation of the stability of the protective materials is insufficient. Therefore, in this study, we fabricated an NCL (Nafion-based composite layer) as a mechanically and chemically stable protective layer for Li metal in Li-O 2 batteries. In addition, comparative experiments were conducted to investigate the mechanical and chemical stability of protective layers. Li-O 2 batteries using NCL-coated Li metal exhibited reversible oxygen reduction and evolution without any side reactions caused by reactive oxygen species that decompose chemically unstable protective materials. The NCL also exhibited effective mechanical strength which was verified with not only a Li stripping and plating test but also using a large scale Li-O 2 pouch cell which had has severe operating conditions with high current and capacity values.",
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A dendrite-and oxygen-proof protective layer for lithium metal in lithium-oxygen batteries. / Kwak, Won Jin; Park, Jiwon; Nguyen, Trung Thien; Kim, Hun; Byon, Hye Ryung; Jang, Minchul; Sun, Yang-Kook.

In: Journal of Materials Chemistry A, Vol. 7, No. 8, 01.01.2019, p. 3857-3862.

Research output: Contribution to journalArticleResearchpeer-review

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AB - The problem of Li metal degradation, which leads to drastic side reactions, must be solved for improving the long-Term cycle performance of lithium-oxygen (Li-O 2 ) batteries. Recently, a number of methodologies have been proposed for Li metal surface protection, but evaluation of the stability of the protective materials is insufficient. Therefore, in this study, we fabricated an NCL (Nafion-based composite layer) as a mechanically and chemically stable protective layer for Li metal in Li-O 2 batteries. In addition, comparative experiments were conducted to investigate the mechanical and chemical stability of protective layers. Li-O 2 batteries using NCL-coated Li metal exhibited reversible oxygen reduction and evolution without any side reactions caused by reactive oxygen species that decompose chemically unstable protective materials. The NCL also exhibited effective mechanical strength which was verified with not only a Li stripping and plating test but also using a large scale Li-O 2 pouch cell which had has severe operating conditions with high current and capacity values.

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