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Nanocellulose Modified Polyethylene Separators for Lithium Metal Batteries
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. (Nanoteknologi och funktionella material)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0001-6118-0226
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2018 (English)In: Small, ISSN 1613-6810, E-ISSN 1613-6829, Vol. 14, no 21, article id 1704371Article in journal (Refereed) Published
Abstract [en]

Abstract Poor cycling stability and safety concerns regarding lithium (Li) metal anodes are two major issues preventing the commercialization of high‐energy density Li metal‐based batteries. Herein, a novel tri‐layer separator design that significantly enhances the cycling stability and safety of Li metal‐based batteries is presented. A thin, thermally stable, flexible, and hydrophilic cellulose nanofiber layer, produced using a straightforward paper‐making process, is directly laminated on each side of a plasma‐treated polyethylene (PE) separator. The 2.5 µm thick, mesoporous (≈20 nm average pore size) cellulose nanofiber layer stabilizes the Li metal anodes by generating a uniform Li+ flux toward the electrode through its homogenous nanochannels, leading to improved cycling stability. As the tri‐layer separator maintains its dimensional stability even at 200 °C when the internal PE layer is melted and blocks the ion transport through the separator, the separator also provides an effective thermal shutdown function. The present nanocellulose‐based tri‐layer separator design thus significantly facilitates the realization of high‐energy density Li metal‐based batteries.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2018. Vol. 14, no 21, article id 1704371
Keywords [en]
cellulose, current distribution, lithium dendrites, lithium metal batteries, separators
National Category
Materials Chemistry Engineering and Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
URN: urn:nbn:se:uu:diva-349143DOI: 10.1002/smll.201704371ISI: 000434173300006PubMedID: 29675952OAI: oai:DiVA.org:uu-349143DiVA, id: diva2:1199741
Funder
Swedish Foundation for Strategic Research , RMA-110012Swedish Energy AgencyStandUpAvailable from: 2018-04-22 Created: 2018-04-22 Last updated: 2018-09-28Bibliographically approved

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Pan, RuijunXu, XingxingSun, RuiWang, ZhaohuiLindh, JonasEdström, KristinaStrömme, MariaNyholm, Leif

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Pan, RuijunXu, XingxingSun, RuiWang, ZhaohuiLindh, JonasEdström, KristinaStrömme, MariaNyholm, Leif
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Inorganic ChemistrySolid State ElectronicsNanotechnology and Functional MaterialsStructural Chemistry
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