高倾角 WO3 沉积实现快速响应的水系锌离子电致变色

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Abstract：Aqueous zinc-ionelectrochromic（EC）technology，boasting thecapabilitytofulfillboth safetyandcost-effectiveness requirements，is garnering extensive attention in variousapplication areas including smart windows，thermal management，displays，and camouflage.However，typical inorganic EC materials，such as tungsten oxides （WO3 ），often suffer from slow ion diffusion kinetics and limited optical contrast within the aqueous Zn2+ electrolyte because of the large size and strong Coulombic interactions of the Zn2+ ，whichlimitstheirwideapplicability.Here，ordered WO3 nanowire films，constructedbyaone-stepgrazingangledeposition method，isdemonstrated to boost theresponse speed and optical contrast during EC phenomena. Compared with dense films，the ordered W03 nanowire films with a porosity of 44.6% demonstrateanti-reflective property and excellent comprehensive EC performance，including fast response time（3.6s and 1.2 sfor coloringand bleaching，respectively），large optical contrast（66. 6% at 700 nm）and high coloration efficiency （64.3cm2⋅C-1） .Alarge-area prototype ECdevice（17 cm×12 cm）with fast color-switching is also successfullyachieved.Mechanisticstudiesshow that theimproved performanceismainlydueto theorderedporous nanowirestructures，which providesdirectelectrontransferpathsand suffcient interfacialcontacts，thussimultaneously enhancing theelectrochemicalactivityandfastredoxkinetics.This studyprovides asimpleandefective strategy to improve the performance of tungsten oxide-based aqueous zinc ion EC materials and devices.

Key words：electrochromic; W03 ；aqueous Zn2+ electrolyte；ordered nanowires；glancing angle deposition

CLC number：O482.31 Documentcode：A

DOI：10.37188/CJL.20250031 CSTR：32170.14.CJL.20250031

摘要：水系锌离子电致变色技术因其优异的安全性和成本效益，在智能窗户、热管理、显示器和伪装等领域展现出广阔的应用前景。（剩余32273字）