期刊
ELECTROCHIMICA ACTA
卷 330, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.135189
关键词
Tungsten oxide; Titanium oxide; Core/shell nanowires; Magnetron sputtering; Electrochromic
资金
- National Natural Science Foundation of China [51772072]
- Foundation for Tian Chang Intelligent Equipment and Instruments Research Institute [JZ2017AHDS1147]
- Natural Science Foundation of Anhui Province [1708085ME100]
- Fundamental Research Funds for the Central Universities [PA2019GDQT0022, PA2019GDQT0015, 201710359015]
- 111 Project New Materials and Technology for Clean Energy [B18018]
Unique WO3/TiO2 core-shell nanowire heterostructures are rationally constructed based on a solvothermal method combining magnetron sputtering. High resolution transmission electron microscopy (HRTEM) analysis evidences the existence of a semi-coherent interface between a hexagonal phase WO3 core and anatase TiO2 shell. X-ray photoelectron spectroscopy and optical absorption spectra suggest an interfacial interaction between the WO3 core and TiO2 shell. The WO3/TiO2 core-shell nanowires exhibit superior electrochromic performance in both visible and near infrared regions with large optical modulation (87.0% at 1500 nm and 85.3% at 633 nm), short bleaching-coloration times (1.1 s and 3.0 s), decent coloring efficiency (102.1 cm(2) C-1) and excellent cycling stability (95.6% after 3000 cycles). The obtained WO3/TiO2 core-shell nanowire heterostructures may find great potential in producing electrochromic nanodevices and other energy-efficient applications. (C) 2019 Elsevier Ltd. All rights reserved.
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