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MXene//MnO2 Asymmet...
MXene//MnO2 Asymmetric Supercapacitors with High Voltages and High Energy Densities
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- Zheng, Wei (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten,Tunnfilmsfysik
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- Halim, Joseph, 1985- (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten,Tunnfilmsfysik
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- Yang, Li (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten,Southeast Univ, Peoples R China
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- Badr, Hussein O. (author)
- Drexel Univ, PA 19104 USA
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- Sun, ZhengMing (author)
- Southeast Univ, Peoples R China
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- Persson, Per, 1971- (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten
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- Rosén, Johanna, 1975- (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten
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- Barsoum, Michel, 1955- (author)
- Linköpings universitet,Materialdesign,Tekniska fakulteten,Tunnfilmsfysik,Drexel Univ, PA 19104 USA
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(creator_code:org_t)
- 2022-06-14
- 2022
- English.
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In: Batteries & Supercaps. - : Wiley-V C H Verlag GMBH. - 2566-6223. ; 5:10
- Related links:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Aqueous asymmetric supercapacitors (AASCs) can have high voltages and high energy densities. However, the rational design of AASCs with proper negative and positive electrodes remains a challenge. Herein, we report on an AASC using Mo1.33CTz MXene films as the negative electrode, and tetramethylammonium cation intercalated birnessite (TMA(+)-MnO2) films as the positive electrode in a 21 mol kg(-1) lithium bis(trifluoromethanesulphonyl)imide (LiTFSI) electrolyte. Benefiting from a high, stable voltage of 2.5 V, an energy density of 86.5 Wh L-1 at 2 mV s(-1) and a power density of 10.3 kW L-1 at 1 Vs(-1) were achieved. The cells also exhibit excellent cycling stability (>98% after 1,0000 cycles at 100 mV s(-1)) and a 51.1 % voltage retention after 10 h. This good performance is attributed to the high stable potential window and high volumetric capacitances of both Mo1.33CTz and TMA(+)-MnO2 electrodes in highly concentrated electrolytes. This work provides a roadmap for developing high performance AASCs with high voltages and high energy/power densities, with relatively slow self-discharge rates.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- birnessite MnO2; high energy density; high voltage; MXene; supercapacitors
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zheng, Wei
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Halim, Joseph, 1 ...
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Yang, Li
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Badr, Hussein O.
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Sun, ZhengMing
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Persson, Per, 19 ...
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Rosén, Johanna, ...
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Barsoum, Michel, ...
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- 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 ...
- Articles in the publication
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Batteries & Supe ...
- By the university
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Linköping University