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Lithium trapping in alloy forming electrodes and current collectors for lithium based batteries
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 - Ångström, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. Uppsala Univ, Angstrom Lab, Dept Chem, Box 538, SE-75121 Uppsala, Sweden..
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2017 (English)In: Energy & Environmental Science, ISSN 1754-5692, E-ISSN 1754-5706, Vol. 10, no 6, p. 1350-1357Article in journal (Refereed) Published
Abstract [en]

Significant capacity losses are generally seen for batteries containing high-capacity lithium alloy forming anode materials such as silicon, tin and aluminium. These losses are generally ascribed to a combination of volume expansion effects and irreversible electrolyte reduction reactions. Here, it is shown, based on e.g. elemental analyses of cycled electrodes, that the capacity losses for tin nanorod and silicon composite electrodes in fact involve diffusion controlled trapping of lithium in the electrodes. While an analogous effect is also demonstrated for copper, nickel and titanium current collectors, boron-doped diamond is shown to function as an effective lithium diffusion barrier. The present findings indicate that the durability of lithium based batteries can be improved significantly via proper electrode design or regeneration of the used electrodes.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2017. Vol. 10, no 6, p. 1350-1357
Keywords [en]
LI-ION BATTERIES; ENERGY-STORAGE DEVICES; NEGATIVE ELECTRODES; ELECTROCHEMICAL LITHIATION; PHOTOELECTRON-SPECTROSCOPY; SILICON ELECTRODES; METAL ANODES; ELECTROLYTES; INSERTION; SURFACE
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-328278DOI: 10.1039/c7ee00244kISI: 000403320300006OAI: oai:DiVA.org:uu-328278DiVA, id: diva2:1168226
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Swedish Research Council, VR 2012-4681Available from: 2017-12-20 Created: 2017-12-20 Last updated: 2017-12-28Bibliographically approved

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Rehnlund, DavidLindgren, FredrikNordh, TimZou, YimingPettersson, JeanBoman, MatsEdström, KristinaNyholm, Leif
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