Back to Search
Start Over
Sea-Cucumber-like Microstructure Polyoxometalate/TiO 2 Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices.
- Source :
- Molecules; Mar2023, Vol. 28 Issue 6, p2634, 12p
- Publication Year :
- 2023
-
Abstract
- The key challenge in the practical application of electrochromic energy storage devices (EESDs) is the fabrication of high-performance electrode materials. Herein, we deposited K<subscript>7</subscript>[La(H<subscript>2</subscript>O)<subscript>x</subscript>(α<subscript>2</subscript>-P<subscript>2</subscript>W<subscript>17</subscript>O<subscript>61</subscript>)] (P<subscript>2</subscript>W<subscript>17</subscript>La) onto TiO<subscript>2</subscript> nanowires (NW) to construct an NW–P<subscript>2</subscript>W<subscript>17</subscript>La nanocomposite using a layer-by-layer self-assembly method. In contrast to the pure P<subscript>2</subscript>W<subscript>17</subscript>La films, the nanocomposite exhibits enhanced electrochromic and electrochemical performance owing to the 3D sea-cucumber-like microstructure. An EESD using the NW–P<subscript>2</subscript>W<subscript>17</subscript>La film as the cathode exhibited outstanding electrochromic and energy storage properties, with high optical modulation (48.6% at 605 nm), high switching speeds (t<subscript>coloring</subscript> = 15 s, t<subscript>bleaching</subscript> = 4 s), and high area capacitance (5.72 mF cm<superscript>−2</superscript> at 0.15 mA cm<superscript>−2</superscript>). The device can reversibly switch between transparent and dark blue during the charge/discharge process, indicating that electrochromic contrast can be used as a quantitative indicator of the energy storage status. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14203049
- Volume :
- 28
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Molecules
- Publication Type :
- Academic Journal
- Accession number :
- 162784928
- Full Text :
- https://doi.org/10.3390/molecules28062634