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Lithium Photo‐intercalation of CdS‐Sensitized WO 3 Anode for Energy Storage and Photoelectrochromic Applications
Author(s) -
Wang Zhuoran,
Chiu HsienChieh,
Paolella Andrea,
Zaghib Karim,
Demopoulos George P.
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201803061
Subject(s) - intercalation (chemistry) , materials science , anode , electrolyte , semiconductor , electrochemistry , lithium (medication) , energy storage , nanocomposite , nanotechnology , context (archaeology) , coating , chemical engineering , inorganic chemistry , optoelectronics , chemistry , electrode , medicine , paleontology , power (physics) , physics , quantum mechanics , engineering , biology , endocrinology
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 WO 3 , thinly coated with TiO 2 and sensitized by the photoactive semiconductor CdS. During light exposure, the photoelectrons from CdS are transported to the WO 3 /electrolyte interface, where Li‐ion intercalation takes place. Photoelectron transport is facilitated by the interfacial TiO 2 layer. The WO 3 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.