PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor
As a typical pseudocapacitor material, VO<sub>x</sub> possesses mixed valence states, making it an ideal electrode material for symmetric screen-printed supercapacitors. However, its high internal resistance and low energy density are the main hurdles to its widespread application. In th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/10/1856 |
| _version_ | 1827720364455624704 |
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| author | Qiang Zhang Xianran Li Yinyin Zheng Qian Tu Shiwen Wei Hong Shi Wentao Tang Liangzhe Chen |
| author_facet | Qiang Zhang Xianran Li Yinyin Zheng Qian Tu Shiwen Wei Hong Shi Wentao Tang Liangzhe Chen |
| author_sort | Qiang Zhang |
| collection | DOAJ |
| description | As a typical pseudocapacitor material, VO<sub>x</sub> possesses mixed valence states, making it an ideal electrode material for symmetric screen-printed supercapacitors. However, its high internal resistance and low energy density are the main hurdles to its widespread application. In this study, a two-dimensional PANI@VO<sub>x</sub> nanobelt with a core-shell architecture was constructed via a two-step route. This strategy involves the preparation of VO<sub>x</sub> using a solvothermal method, and a subsequent in situ polymerization process of the PANI. By virtue of the synergistic effect between the VO<sub>x</sub> core and the PANI shell, the optimal VO<sub>x</sub>@PANI has an enhanced conductivity of 0.7 ± 0.04 S/Ω, which can deliver a high specific capacitance of 347.5 F/g at 0.5 A/g, a decent cycling life of ~72.0%, and an outstanding Coulomb efficiency of ~100% after 5000 cycles at 5 A/g. Moreover, a flexible all-solid-state symmetric supercapacitor (VO<sub>x</sub>@PANI SSC) with an in-planar interdigitated structure was screen-printed and assembled on a nickel current collector; it yielded a remarkable areal energy density of 115.17 μWh/cm<sup>2</sup> at an areal power density of 0.39 mW/cm<sup>2</sup>, and possessed outstanding flexibility and mechanical performance. Notably, a “Xiaomi” hygrothermograph (3.0 V) was powered easily by tandem SSCs with an operating voltage of 3.1 V. Therefore, this advanced pseudocapacitor material with core-shell architecture opens novel ideas for flexible symmetric supercapacitors in powering portable/wearable products. |
| first_indexed | 2024-03-10T21:02:17Z |
| format | Article |
| id | doaj.art-1a4ce96e60fd4d698627f516669b9e82 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T21:02:17Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-1a4ce96e60fd4d698627f516669b9e822023-11-19T17:23:49ZengMDPI AGMicromachines2072-666X2023-09-011410185610.3390/mi14101856PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State SupercapacitorQiang Zhang0Xianran Li1Yinyin Zheng2Qian Tu3Shiwen Wei4Hong Shi5Wentao Tang6Liangzhe Chen7School of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaSchool of Electronic Information Engineering, Jingchu University of Technology, Jingmen 448000, ChinaAs a typical pseudocapacitor material, VO<sub>x</sub> possesses mixed valence states, making it an ideal electrode material for symmetric screen-printed supercapacitors. However, its high internal resistance and low energy density are the main hurdles to its widespread application. In this study, a two-dimensional PANI@VO<sub>x</sub> nanobelt with a core-shell architecture was constructed via a two-step route. This strategy involves the preparation of VO<sub>x</sub> using a solvothermal method, and a subsequent in situ polymerization process of the PANI. By virtue of the synergistic effect between the VO<sub>x</sub> core and the PANI shell, the optimal VO<sub>x</sub>@PANI has an enhanced conductivity of 0.7 ± 0.04 S/Ω, which can deliver a high specific capacitance of 347.5 F/g at 0.5 A/g, a decent cycling life of ~72.0%, and an outstanding Coulomb efficiency of ~100% after 5000 cycles at 5 A/g. Moreover, a flexible all-solid-state symmetric supercapacitor (VO<sub>x</sub>@PANI SSC) with an in-planar interdigitated structure was screen-printed and assembled on a nickel current collector; it yielded a remarkable areal energy density of 115.17 μWh/cm<sup>2</sup> at an areal power density of 0.39 mW/cm<sup>2</sup>, and possessed outstanding flexibility and mechanical performance. Notably, a “Xiaomi” hygrothermograph (3.0 V) was powered easily by tandem SSCs with an operating voltage of 3.1 V. Therefore, this advanced pseudocapacitor material with core-shell architecture opens novel ideas for flexible symmetric supercapacitors in powering portable/wearable products.https://www.mdpi.com/2072-666X/14/10/1856VO<sub>x</sub> nanobeltsPANIcore-shell architectureflexiblesupercapacitorelectronics |
| spellingShingle | Qiang Zhang Xianran Li Yinyin Zheng Qian Tu Shiwen Wei Hong Shi Wentao Tang Liangzhe Chen PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor Micromachines VO<sub>x</sub> nanobelts PANI core-shell architecture flexible supercapacitor electronics |
| title | PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor |
| title_full | PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor |
| title_fullStr | PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor |
| title_full_unstemmed | PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor |
| title_short | PANI-Coated VO<sub>x</sub> Nanobelts with Core-Shell Architecture for Flexible All-Solid-State Supercapacitor |
| title_sort | pani coated vo sub x sub nanobelts with core shell architecture for flexible all solid state supercapacitor |
| topic | VO<sub>x</sub> nanobelts PANI core-shell architecture flexible supercapacitor electronics |
| url | https://www.mdpi.com/2072-666X/14/10/1856 |
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