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Durability of electrochromic films: Aging kinetics and rejuvenation
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0002-8279-5163
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Materials Processing Center, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2017 (English)In: ECS Transactions, Electrochemical Society, 2017, Vol. 77, 1659-1669 p.Conference paper, Published paper (Refereed)
Abstract [en]

A major challenge for energy-efficient smart window technology is to ensure the durability of electrochromic (EC) devices over aservice life of more than 20 years. In this paper, we report recent results from a fundamental study of the aging kinetics of EC tungsten oxide and nickel oxide thin films and describe electrochemical rejuvenation mechanisms that are able to restore the films to their initial state. The aging kinetics displays an approximate power-law decrease of the charge capacity as a function of cycle number. This decay of charge capacity can be understood in terms of models built on so-called dispersive chemical kinetics. Tungsten oxide and nickel oxide EC films can be rejuvenated by applying a high electrochemical potential or a small constant current. Trapped ions in the bulk or at the surface of the films can be released by these procedures.

Place, publisher, year, edition, pages
Electrochemical Society, 2017. Vol. 77, 1659-1669 p.
Series
ECS Transactions, 77 (11)
National Category
Materials Engineering
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-332945DOI: 10.1149/07711.1659ecstOAI: oai:DiVA.org:uu-332945DiVA: diva2:1154551
Conference
231st ECS Meeting, New Orleans, May 28 - June 1, 2017
Funder
Swedish Research Council, 2016-03713EU, European Research Council, 267234
Available from: 2017-11-02 Created: 2017-11-02 Last updated: 2017-11-06

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Niklasson, Gunnar A.Wen, Rui-TaoQu, HuiyingArvizu, Miguel AGranqvist, Claes-Göran
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