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      Lithium Photo-intercalation of CdS-Sensitized WO3 Anode for Energy Storage and Photoelectrochromic Applications.

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          Abstract

          Integration of solar-energy harvesting and storage functions has attracted significant research attention, as it holds promise for ultimate development of light-chargeable devices. In this context, a functional nanocomposite anode that not only permits electrochemical energy storage through Li-ion photo-intercalation, but also exhibits potential for photoelectrochromic applications, was investigated. The nanocomposite is made of the Li-ion intercalation compound WO3 , thinly coated with TiO2 and sensitized by the photoactive semiconductor CdS. During light exposure, the photoelectrons from CdS are transported to the WO3 /electrolyte interface, where Li-ion intercalation takes place. Photoelectron transport is facilitated by the interfacial TiO2 layer. The WO3 was shown to be functional in multiple photocharge-discharge cycles, but the CdS suffers from degradation and photocorrosion. Hence, the selection of compatible semiconductors and protective coating strategies should be pursued to overcome these issues.

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          Author and article information

          Journal
          ChemSusChem
          ChemSusChem
          Wiley
          1864-564X
          1864-5631
          May 21 2019
          : 12
          : 10
          Affiliations
          [1 ] Materials Engineering, McGill University, 3610 University Street, Montreal, QC, H3A 0C5, Canada.
          [2 ] Centre d'excellence-ETSE, Hydro-Québec, 1806 Boulevard Lionel Boulet, Varennes, QC, J3X 1S1, Canada.
          Article
          10.1002/cssc.201803061
          30770645
          20b2ad64-cd58-47d6-b249-996f8278bb50
          © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
          History

          lithium,photoelectrochromism,tungsten,photo-intercalation,electrochemistry

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