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Large interspaced l...
Large interspaced layered potassium niobate nanosheet arrays as an ultrastable anode for potassium ion capacitor
- Artikel/kapitelEngelska2021
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Elsevier B.V.2021
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:miun-43445
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https://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-43445URI
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https://doi.org/10.1016/j.ensm.2020.10.013DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Potassium-ion battery (KIB) is a promising technology for large-scale energy storage applications due to their low cost, theoretically high energy density and abundant resources. However, the development of KIBs is hindered by the sluggish K+ transport kinetics and the structural instability of the electrode materials during K+ intercalation/de-intercalation. In the present investigation, we have designed a potassium-ion capacitor (KIC) using layered potassium niobate (K4Nb6O17, KNO) nanosheet arrays as anode and orange-peel derived activated carbons (OPAC) as fast capacitive cathode materials. The systematic electrochemical analysis with the ex-situ characterizations demonstrates that KNO-anode exhibits highly stable layered structure with excellent reversibility during K+ insertion/de-insertion. After optimization, the fabricated KNO//OPAC delivers both a high energy density of 116 Wh/kg and high power density of 10,808 W/kg, which is significantly higher than other similar hybrid devices. The cell also displays long term cycling stability over 5000 cycles, with 87 % of capacity retention. This study highlights the utilization of layered nanosheet arrays of niobates to achieve superior K-storage for KICs, paving the way towards the development of high-performance anodes for post lithium-ion batteries. © 2020
Ämnesord och genrebeteckningar
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Energy density
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Potassium ion capacitor
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Potassium Niobate
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Waste derived carbon
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Cathodes
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Energy storage
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Ions
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Lithium-ion batteries
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Nanosheets
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Niobium compounds
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Potassium
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Abundant resources
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Capacity retention
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Electrochemical analysis
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Energy storage applications
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High energy densities
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High power density
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High-performance anodes
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Structural instability
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Anodes
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Chodankar, N. R.
(författare)
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Jadhav, S. D.
(författare)
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Jayaramulu, K.
(författare)
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Nanjundan, A. K.
(författare)
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Dubal, D. P.
(författare)
Sammanhörande titlar
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Ingår i:Energy Storage Materials: Elsevier B.V.34, s. 475-4822405-82892405-8297
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