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A Dual-Functional E...
A Dual-Functional Electrolyte Additive for High-Performance Potassium Metal Batteries
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- Park, Jimin (author)
- Hanyang University
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- Jeong, Yeseul (author)
- Chonnam National University
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- Kang, Hyokyeong (author)
- Hanyang University
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- Yu, Tae Yeon (author)
- Hanyang University
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- Xu, Xieyu (author)
- Xi'an Jiaotong University
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- Liu, Yangyang (author)
- Xi'an Jiaotong University
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- Xiong, Shizhao, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lee, Seon Hwa (author)
- Pohang Iron and Steel (POSCO)
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- Sun, Yang Kook (author)
- Hanyang University
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- Hwang, Jang Yeon (author)
- Hanyang University
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Advanced Functional Materials. - 1616-3028 .- 1616-301X. ; 33:48
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https://doi.org/10.1...
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Abstract
Subject headings
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- Potassium metal batteries (KMBs) coupled with layered transition metal oxides as cathode materials are a promising energy−storage technology owing to low cost and high capacity. However, uncontrollable dendritic growth in the K−metal anode and chemical reactivity of the layered transition metal oxide cathode against the electrolyte solution cause KMBs to suffer from low Coulombic efficiency, rapid capacity fading, and critical safety issues. In this study, an electrolyte engineering strategy is introduced by introducing adiponitrile (ADN) as a dual−functional electrolyte additive containing an electron−rich nitrile group (C≡N) in its molecule structure. Thus, the addition of 1 wt.% ADN can alter the chemical properties of the electrolyte solution, thereby improving the anode−electrolyte and cathode−electrolyte interfacial stabilities in KMBs. The formation of a potassiophilic compound with C≡N in the solid electrolyte interphase layer can guide the uniform electrodeposition of K and suppress the dendritic growth in the K−metal. Moreover, C≡N forms a strong coordination bond with the oxidized transition metal, leading the reversible redox reactions by mitigating the undesirable disproportionation reaction and improving the thermal stability of the layered transition metal oxide cathode. Computational calculations and experimental characterizations are used to verify the role of ADN additive in enhancing the electrochemical properties of KMBs.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- electrolyte additives
- phase−field modeling
- layered transition metal oxide cathodes
- density functional theory
- potassium metal anodes
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Park, Jimin
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Jeong, Yeseul
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Kang, Hyokyeong
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Yu, Tae Yeon
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Xu, Xieyu
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Liu, Yangyang
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show more...
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Xiong, Shizhao, ...
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Lee, Seon Hwa
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Sun, Yang Kook
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Hwang, Jang Yeon
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Inorganic Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
- Articles in the publication
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- By the university
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Chalmers University of Technology