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The multifunctional role of carbon in electrochemical energy storage: Graphitic foams for 3D microbatteries and dual-ion batteries
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Uppsala: Uppsala universitet, 2019.
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-396384OAI: oai:DiVA.org:uu-396384DiVA, id: diva2:1367578
Presentation
2019-11-25, Häggsalen, Ångström Laboratory, 13:15 (English)
Opponent
Supervisors
Available from: 2019-11-12 Created: 2019-11-04 Last updated: 2019-11-12Bibliographically approved
List of papers
1. Tailoring the Microstructure and Electrochemical Performance of 3D Microbattery Electrodes Based on Carbon Foams
Open this publication in new window or tab >>Tailoring the Microstructure and Electrochemical Performance of 3D Microbattery Electrodes Based on Carbon Foams
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2019 (English)In: Energy Technology, ISSN 0829-7681, E-ISSN 2057-4215, Vol. 7, no 10, article id UNSP 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 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.

Keywords
carbon foams, emulsions, lithium-ion storage, microbatteries, three-dimensional
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-393356 (URN)10.1002/ente.201900797 (DOI)000481541100001 ()
Funder
Swedish Research Council, 2012-4681Swedish Energy AgencyStandUpKnut and Alice Wallenberg Foundation
Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-11-04Bibliographically approved
2. 3D Electrodes Fabricated from Nano-graphitic Carbon Foams with Enhanced Lithium-ion Storage
Open this publication in new window or tab >>3D Electrodes Fabricated from Nano-graphitic Carbon Foams with Enhanced Lithium-ion Storage
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(English)Manuscript (preprint) (Other academic)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-396382 (URN)
Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2019-11-06Bibliographically approved
3. The Cathode Electrolyte Interphase on Graphite Positive Electrode in Dual-ion Batteries Probed Using X-ray Photoelectron Spectroscopy
Open this publication in new window or tab >>The Cathode Electrolyte Interphase on Graphite Positive Electrode in Dual-ion Batteries Probed Using X-ray Photoelectron Spectroscopy
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(English)Manuscript (preprint) (Other academic)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-396383 (URN)
Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2019-11-06Bibliographically approved

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