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Tailoring the Microstructure and Electrochemical Performance of 3D Microbattery Electrodes Based on Carbon Foams
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström. (Structural Chemistry)ORCID iD: 0000-0001-5861-4281
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. (Strukturkemi)
(Materials and Environmental Chemistry- Arrhenius laboratory)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry. (Oorganisk kemi, Elektrokemi och korrosion)
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2019 (English)In: Energy Technology, ISSN 0829-7681, E-ISSN 2057-4215Article 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 μm are produced, and improvements are observed both in the coulombic efficiency and the cyclability of the carbon foam electrodes synthesized at 2200 °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 μA 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 μA cm−2 indicating that the materials are promising for power demanding applications.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019.
Keywords [en]
carbon foams, emulsions, lithium-ion storage, microbatteries, three-dimensional
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-393356DOI: 10.1002/ente.201900797OAI: oai:DiVA.org:uu-393356DiVA, id: diva2:1352825
Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-09-19

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Publisher's full texthttps://onlinelibrary.wiley.com/doi/full/10.1002/ente.201900797

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Asfaw, Habtom DestaKotronia, AntoniaNyholm, LeifEdström, Kristina
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