In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 16 ( 2023), p. 5505-5514
Abstract:
Electrochromic energy storage devices with diversified functions that can realize intelligent visualization of the energy status with the naked eye are highly desirable for intelligent electronic technology. Polyoxometalates (POMs) as a promising electrochromic energy storage material are bottlenecked by limited choices in the electrolyte to achieve high-performance electrochromic smart windows. Herein, we report a novel tri-niobium substituted Dawson-type POM α-K 9 [P 2 W 15 Nb 3 O 62 ]·18H 2 O (P 2 W 15 Nb 3 ) coated TiO 2 as an electrochromic electrode for non-aqueous electrochromic energy storage smart windows, utilizing a dual-ion electrolyte with Zn 2+ and Al 3+ . Our findings suggest that the synergistic effects of the dual-ion Zn 2+ /Al 3+ -ion electrolyte on P 2 W 15 Nb 3 films greatly promote the electrochromic and electrochemical properties: high optical contrast (90% at 650 nm) in the 350–1500 nm range, large areal capacity (52 mF cm −2 at 0.66 mA cm −2 ), fast switching time and good cycling stability. Remarkably, a bi-functional electrochromic energy storage device (EESD) was also successfully assembled using a P 2 W 15 Nb 3 composite film and a hydrothermally prepared NiO film. This dual-ion Zn 2+ /Al 3+ electrolyte opens a new direction for the development of POM based smart windows with high contrast, long life-time stability and excellent energy storage.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702245-6
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