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Unlocking high capacities of graphite anodes for potassium-ion batteries
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.ORCID iD: 0000-0001-5641-7778
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.ORCID iD: 0000-0003-2538-8104
2019 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 9, no 36, p. 21070-21074Article in journal (Refereed) Published
Abstract [en]

Graphite is considered a promising candidate as the anode for potassium-ion batteries (KIBs). Here, we demonstrate a significant improvement in performance through the ball-milling of graphite. Electrochemical techniques show reversible K-intercalation into graphitic layers, with 65% capacity retention after 100 cycles from initial capacities and extended cycling beyond 200 cycles. Such an affinity of the graphite towards storage of K-ions is explained by means of SEM and Raman analyses. Graphite ball-milling results in a gentle mechanical exfoliation of the graphene layers and simultaneous defect formation, leading to enhanced electrochemical performance.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2019. Vol. 9, no 36, p. 21070-21074
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-391016DOI: 10.1039/c9ra01931fISI: 000474306500065OAI: oai:DiVA.org:uu-391016DiVA, id: diva2:1344452
Funder
Swedish Energy Agency, 2017-013531ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 18-317Available from: 2019-08-21 Created: 2019-08-21 Last updated: 2019-08-21Bibliographically approved

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