Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors
High-energy density supercapacitors have attracted extensive attention due to their electrode structure design. A synergistic effect related to core–shell structure can improve the energy storage capacity and power density of electrode materials. The Ni-foam (NF) substrate coupled with polypyrrole (...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/23/8168 |
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| author | Anran Shi Xiumei Song Lei Wei Huiyuan Ma Haijun Pang Weiwei Li Xiaowei Liu Lichao Tan |
| author_facet | Anran Shi Xiumei Song Lei Wei Huiyuan Ma Haijun Pang Weiwei Li Xiaowei Liu Lichao Tan |
| author_sort | Anran Shi |
| collection | DOAJ |
| description | High-energy density supercapacitors have attracted extensive attention due to their electrode structure design. A synergistic effect related to core–shell structure can improve the energy storage capacity and power density of electrode materials. The Ni-foam (NF) substrate coupled with polypyrrole (PPy) conductive coating can serve as an internal/external bicontinuous conductive network. In this work, the distinctive PPy@FeNi<sub>2</sub>S<sub>4</sub>@NF and PPy@NiCo<sub>2</sub>S<sub>4</sub>@NF materials were prepared by a simple two-step hydrothermal synthesis with a subsequent in situ polymerization method. PPy@FeNi<sub>2</sub>S<sub>4</sub>@NF and PPy@NiCo<sub>2</sub>S<sub>4</sub>@NF could deliver ultrahigh specific capacitances of 3870.3 and 5771.4 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup> and marvelous cycling capability performances of 81.39% and 93.02% after 5000 cycles. The asymmetric supercapacitors composed of the prepared materials provided a high-energy density of over 47.2 Wh·kg<sup>−1</sup> at 699.9 W·kg<sup>−1</sup> power density and 67.11 Wh·kg<sup>−1</sup> at 800 W·kg<sup>−1</sup> power density. Therefore, the self-assembled core–shell structure can effectively improve the electrochemical performance and will have an effective service in advanced energy-storage devices. |
| first_indexed | 2024-03-09T17:41:01Z |
| format | Article |
| id | doaj.art-c44839b9ee944f64a4392074dd3e63dd |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T17:41:01Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-c44839b9ee944f64a4392074dd3e63dd2023-11-24T11:37:46ZengMDPI AGMolecules1420-30492022-11-012723816810.3390/molecules27238168Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical SupercapacitorsAnran Shi0Xiumei Song1Lei Wei2Huiyuan Ma3Haijun Pang4Weiwei Li5Xiaowei Liu6Lichao Tan7School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaInstitute of Carbon Neutrality, Zhejiang Wanli University, Ningbo 315100, ChinaSchool of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaSchool of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaSchool of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaChilwee Power Co., Ltd., No. 18 Chengnan Road, Huaxi Industrial Zone, Changxing 313100, ChinaChilwee Power Co., Ltd., No. 18 Chengnan Road, Huaxi Industrial Zone, Changxing 313100, ChinaSchool of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaHigh-energy density supercapacitors have attracted extensive attention due to their electrode structure design. A synergistic effect related to core–shell structure can improve the energy storage capacity and power density of electrode materials. The Ni-foam (NF) substrate coupled with polypyrrole (PPy) conductive coating can serve as an internal/external bicontinuous conductive network. In this work, the distinctive PPy@FeNi<sub>2</sub>S<sub>4</sub>@NF and PPy@NiCo<sub>2</sub>S<sub>4</sub>@NF materials were prepared by a simple two-step hydrothermal synthesis with a subsequent in situ polymerization method. PPy@FeNi<sub>2</sub>S<sub>4</sub>@NF and PPy@NiCo<sub>2</sub>S<sub>4</sub>@NF could deliver ultrahigh specific capacitances of 3870.3 and 5771.4 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup> and marvelous cycling capability performances of 81.39% and 93.02% after 5000 cycles. The asymmetric supercapacitors composed of the prepared materials provided a high-energy density of over 47.2 Wh·kg<sup>−1</sup> at 699.9 W·kg<sup>−1</sup> power density and 67.11 Wh·kg<sup>−1</sup> at 800 W·kg<sup>−1</sup> power density. Therefore, the self-assembled core–shell structure can effectively improve the electrochemical performance and will have an effective service in advanced energy-storage devices.https://www.mdpi.com/1420-3049/27/23/8168Ni-based bimetallic sulfidecore-shell structurebicontinuous conductive networkpolypyrrole coatingasymmetric supercapacitors |
| spellingShingle | Anran Shi Xiumei Song Lei Wei Huiyuan Ma Haijun Pang Weiwei Li Xiaowei Liu Lichao Tan Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors Molecules Ni-based bimetallic sulfide core-shell structure bicontinuous conductive network polypyrrole coating asymmetric supercapacitors |
| title | Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors |
| title_full | Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors |
| title_fullStr | Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors |
| title_full_unstemmed | Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors |
| title_short | Design of an Internal/External Bicontinuous Conductive Network for High-Performance Asymmetrical Supercapacitors |
| title_sort | design of an internal external bicontinuous conductive network for high performance asymmetrical supercapacitors |
| topic | Ni-based bimetallic sulfide core-shell structure bicontinuous conductive network polypyrrole coating asymmetric supercapacitors |
| url | https://www.mdpi.com/1420-3049/27/23/8168 |
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