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Tailoring the Microstructure and Electrochemical Performance of 3D Microbattery Electrodes Based on Carbon Foams
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 52019 (English)In: Energy Technology, ISSN 0829-7681, E-ISSN 2057-4215, article id 1900797Article in journal (Refereed) Published
Abstract [en]

Three-dimensional (3D) carbon electrodes with suitable microstructural features and stable electrochemical performance are required for practical applications in 3D lithium (Li)-ion batteries. Herein, the optimization of the microstructures and electrochemical performances of carbon electrodes derived from emulsion-templated polymer foams are dealt with. Exploiting the rheological properties of the emulsion precursors, carbon foams with variable void sizes and specific surface areas are obtained. Carbon foams with an average void size of around 3.8 mu m are produced, and improvements are observed both in the coulombic efficiency and the cyclability of the carbon foam electrodes synthesized at 2200 degrees C. A stable areal capacity of up to 1.22 mAh cm(-2) (108 mAh g(-1)) is achieved at a current density of 50 mu A cm(-2). In addition, the areal capacity remains almost unaltered, i.e., 1.03 mAh cm(-2) (91 mAh g(-1)), although the cycling current density increases to 500 mu A cm(-2) indicating that the materials are promising for power demanding applications.

Place, publisher, year, edition, pages
2019. article id 1900797
Keywords [en]
carbon foams, emulsions, lithium-ion storage, microbatteries, three-dimensional
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:su:diva-173149DOI: 10.1002/ente.201900797ISI: 000481541100001OAI: oai:DiVA.org:su-173149DiVA, id: diva2:1354187
Available from: 2019-09-24 Created: 2019-09-24 Last updated: 2019-09-24Bibliographically approved

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Tai, Cheuk-Wai
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