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Multiscale Interfacial Strategy to Engineer Mixed Metal-Oxide Anodes toward Enhanced Cycling Efficiency
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 52018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 23, p. 20095-20105Article in journal (Refereed) Published
Abstract [en]

Interconnected macro/mesoporous structures of mixed metal oxide (MMO) are developed on nickel foam as freestanding anodes for Li-ion batteries. The sustainable production is realized via a wet chemical etching process with bio-friendly chemicals. By means of divalent iron doping during an in situ recrystallization process, the as-developed MMO anodes exhibit enhanced levels of cycling efficiency. Furthermore, this atomic-scale modification coherently synergizes with the encapsulation layer across a micrometer scale. During this step, we develop a quasi-gel-state tri-copolymer, i.e., F127-resorcinol-melamine, as the N-doped carbon source to regulate the interfacial chemistry of the MMO electrodes. Electrochemical tests of the modified FexN1-xO@NC-NiF anode in both half-cell and full-cell configurations unravel the favorable suppression of the irreversible capacity loss and satisfactory cyclability at the high rates. This study highlights a proof-of-concept modification strategy across multiple scales to govern the interfacial chemical process of the electrodes toward better reversibility.

Place, publisher, year, edition, pages
2018. Vol. 10, no 23, p. 20095-20105
Keywords [en]
iron doping, nickel oxide, interfacial chemistry, cycling efficiency, lithium-ion storage
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-158264DOI: 10.1021/acsami.8b02908ISI: 000435525100089PubMedID: 29782146OAI: oai:DiVA.org:su-158264DiVA, id: diva2:1236794
Available from: 2018-08-06 Created: 2018-08-06 Last updated: 2018-08-06Bibliographically approved

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Tai, Cheuk-WaiEdström, KristinaWei, Bingqing
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