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Title: Tunable intracrystal cavity in tungsten bronze-like bimetallic oxides for electrochromic energy storage
Authors: Cai, Guofa
Zhu, Rui
Liu, Shiyou
Wang, Jinhui
Wei, Congyuan
Griffith, Kent J.
Jia, Yu
Lee, Pooi See
Keywords: Engineering::Materials
Issue Date: 2022
Source: Cai, G., Zhu, R., Liu, S., Wang, J., Wei, C., Griffith, K. J., Jia, Y. & Lee, P. S. (2022). Tunable intracrystal cavity in tungsten bronze-like bimetallic oxides for electrochromic energy storage. Advanced Energy Materials, 12(5), 2103106-.
Journal: Advanced Energy Materials 
Abstract: Designing materials with appropriate crystal and electronic structures to enhance ionic and electronic transport simultaneously are highly desirable for both electrochromic and electrochemical energy storage devices. It remains a great challenge to simultaneously meet these requirements. Here, a Nb18W16O93 nanomaterial is successfully synthesized with superstructure motifs and uniform self-supported electrochromic films are prepared on a transparent conductive substrate. The results show that the films can effectively accommodate lithium ions and facilitate intercalation–deintercalation on transparent fluorine-doped tin oxide (FTO) substrates at high current density. Mechanistic insights into the excellent electrochromic and rechargeable energy storage properties are provided by density functional theory (DFT) calculations. Specifically, the Nb18W16O93 film displays a large optical modulation (up to 93% at 633 nm and 89% at 1200 nm), high coloration efficiency (105.6 cm2 C−1), high energy storage capacity (151.4 mAh g−1 at 2 A g−1), excellent rate capability, and long-term electrochemical stability (6000 cycles). As a demonstration of its application, an energy storage indicator is illustrated and a complementary electrochromic energy storage smart window is fabricated based on the Nb18W16O93 film. The results demonstrate that the Nb18W16O93 nanomaterial has a promising application in the field of high-performance electrochromic and energy storage devices.
ISSN: 1614-6832
DOI: 10.1002/aenm.202103106
Schools: School of Materials Science and Engineering 
Organisations: Singapore-HUJ Alliance for Research and Enterprise (SHARE) 
Nanomaterials for Energy and Water Nexus (NEW) 
Campus for Research Excellence and Technological Enterprise (CREATE) 
Rights: © 2021 The Authors. Advanced Energy Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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