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Lithium trapping in microbatteries based on lithium- and Cu2O-coated copper nanorods
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0003-2394-287X
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Analytical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.ORCID iD: 0000-0003-4440-2952
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0001-9292-016X
2018 (English)In: ChemistrySelect, E-ISSN 2365-6549, Vol. 3, no 8, p. 2311-2314Article in journal (Refereed) Published
Abstract [en]

Microbatteries based on three-dimensional (3D) electrodes composed of thin films of Li and Cu2O coated on Cu nanorod current collectors by electrodeposition and spontaneous oxidation, respectively, are described and characterised electrochemically. High-resolution scanning electron microscopy (HR-SEM) data indicate that the Li electrodeposition resulted in a homogenous coverage of the Cu nanorods and elemental analyses were also used to determine the amount of lithium in the Li-coated electrodes. The results show that 3D Cu2O/Cu electrodes can be cycled versus 3D Li/Cu electrodes but that the capacity decreased during the cycling due to Li trapping in the Cu current collector of the 3D Li/Cu electrode. These findings highlight the problem of using copper current collectors together with metallic lithium as the formation of a solid solution yields considerable losses of electroactive lithium and hence capacity.

Place, publisher, year, edition, pages
2018. Vol. 3, no 8, p. 2311-2314
Keywords [en]
lithium trapping, microbatteries, nanorods, Cu2O, copper
National Category
Inorganic Chemistry
Research subject
Chemistry with specialization in Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-343590DOI: 10.1002/slct.201800281ISI: 000426495600015OAI: oai:DiVA.org:uu-343590DiVA, id: diva2:1186362
Funder
Swedish Research Council, 2012-4681, 2015-04421StandUpSwedish Energy AgencyAvailable from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-05-31Bibliographically approved

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Rehnlund, DavidPettersson, JeanEdström, KristinaNyholm, Leif

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