Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices
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<sub>7</sub>[La(H<sub>2</sub>O)<sub>x</sub>(α<sub>2</sub>-P<sub>2<...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/6/2634 |
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| author | Xiaoshu Qu Lili Zhou Zefeng Liu Zeyu Wang Jilong Wang Xiaoyang Yu Hua Jin Yanyan Yang |
| author_facet | Xiaoshu Qu Lili Zhou Zefeng Liu Zeyu Wang Jilong Wang Xiaoyang Yu Hua Jin Yanyan Yang |
| author_sort | Xiaoshu Qu |
| collection | DOAJ |
| description | 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<sub>7</sub>[La(H<sub>2</sub>O)<sub>x</sub>(α<sub>2</sub>-P<sub>2</sub>W<sub>17</sub>O<sub>61</sub>)] (P<sub>2</sub>W<sub>17</sub>La) onto TiO<sub>2</sub> nanowires (NW) to construct an NW–P<sub>2</sub>W<sub>17</sub>La nanocomposite using a layer-by-layer self-assembly method. In contrast to the pure P<sub>2</sub>W<sub>17</sub>La films, the nanocomposite exhibits enhanced electrochromic and electrochemical performance owing to the 3D sea-cucumber-like microstructure. An EESD using the NW–P<sub>2</sub>W<sub>17</sub>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<sub>coloring</sub> = 15 s, t<sub>bleaching</sub> = 4 s), and high area capacitance (5.72 mF cm<sup>−2</sup> at 0.15 mA cm<sup>−2</sup>). 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. |
| first_indexed | 2024-03-11T06:07:53Z |
| format | Article |
| id | doaj.art-e8abef43f3d3442cb18b9ec034b3fdd2 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T06:07:53Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e8abef43f3d3442cb18b9ec034b3fdd22023-11-17T12:53:03ZengMDPI AGMolecules1420-30492023-03-01286263410.3390/molecules28062634Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage DevicesXiaoshu Qu0Lili Zhou1Zefeng Liu2Zeyu Wang3Jilong Wang4Xiaoyang Yu5Hua Jin6Yanyan Yang7College of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaThe key challenge in the practical application of electrochromic energy storage devices (EESDs) is the fabrication of high-performance electrode materials. Herein, we deposited K<sub>7</sub>[La(H<sub>2</sub>O)<sub>x</sub>(α<sub>2</sub>-P<sub>2</sub>W<sub>17</sub>O<sub>61</sub>)] (P<sub>2</sub>W<sub>17</sub>La) onto TiO<sub>2</sub> nanowires (NW) to construct an NW–P<sub>2</sub>W<sub>17</sub>La nanocomposite using a layer-by-layer self-assembly method. In contrast to the pure P<sub>2</sub>W<sub>17</sub>La films, the nanocomposite exhibits enhanced electrochromic and electrochemical performance owing to the 3D sea-cucumber-like microstructure. An EESD using the NW–P<sub>2</sub>W<sub>17</sub>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<sub>coloring</sub> = 15 s, t<sub>bleaching</sub> = 4 s), and high area capacitance (5.72 mF cm<sup>−2</sup> at 0.15 mA cm<sup>−2</sup>). 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.https://www.mdpi.com/1420-3049/28/6/2634electrochromismenergy storagepolyoxometalatenanostructuresEESD |
| spellingShingle | Xiaoshu Qu Lili Zhou Zefeng Liu Zeyu Wang Jilong Wang Xiaoyang Yu Hua Jin Yanyan Yang Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices Molecules electrochromism energy storage polyoxometalate nanostructures EESD |
| title | Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices |
| title_full | Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices |
| title_fullStr | Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices |
| title_full_unstemmed | Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices |
| title_short | Sea-Cucumber-like Microstructure Polyoxometalate/TiO<sub>2</sub> Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices |
| title_sort | sea cucumber like microstructure polyoxometalate tio sub 2 sub nanocomposite electrode for high performance electrochromic energy storage devices |
| topic | electrochromism energy storage polyoxometalate nanostructures EESD |
| url | https://www.mdpi.com/1420-3049/28/6/2634 |
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