Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor
Dandelion-like CuCo<sub>2</sub>O<sub>4</sub> nanoflowers (CCO NFs) with ultrathin NiMn layered double hydroxide (LDH) shells were fabricated via a two-step hydrothermal method. The prepared CuCo<sub>2</sub>O<sub>4</sub>@NiMn LDH core/shell nanoflowers...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/4/730 |
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| author | Wenhua Zhao Xingliang Xu Niandu Wu Xiaodie Zhao Jiangfeng Gong |
| author_facet | Wenhua Zhao Xingliang Xu Niandu Wu Xiaodie Zhao Jiangfeng Gong |
| author_sort | Wenhua Zhao |
| collection | DOAJ |
| description | Dandelion-like CuCo<sub>2</sub>O<sub>4</sub> nanoflowers (CCO NFs) with ultrathin NiMn layered double hydroxide (LDH) shells were fabricated via a two-step hydrothermal method. The prepared CuCo<sub>2</sub>O<sub>4</sub>@NiMn LDH core/shell nanoflowers (CCO@NM LDH NFs) possessed a high specific surface area (~181 m<sup>2</sup>·g<sup>−1</sup>) with an average pore size of ~256 nm. Herein, the CCO@NM LDH NFs exhibited the typical battery-type electrode material with a specific capacity of 2156.53 F·g<sup>−1</sup> at a current density of 1 A·g<sup>−1</sup>. With the increase in current density, the rate capability retention was 68.3% at a current density of 10 A·g<sup>−1</sup>. In particular, the 94.6% capacity of CCO@NM LDH NFs remains after 2500 cycles at 5 A·g<sup>−1</sup>. An asymmetric supercapacitor (ASC) with CCO@NM LDH NFs//activated carbon (AC) demonstrates a remarkable capacitance of 303.11 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup> with excellent cycling stability. The coupling and synergistic effects of multi-valence transition metals provide a convenient channel for the electrochemical process, which is beneficial to spread widely within the realm of electrochemical energy storage. |
| first_indexed | 2024-03-11T08:19:37Z |
| format | Article |
| id | doaj.art-203db837be8f456399f57144cc785bde |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T08:19:37Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-203db837be8f456399f57144cc785bde2023-11-16T22:28:08ZengMDPI AGNanomaterials2079-49912023-02-0113473010.3390/nano13040730Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type SupercapacitorWenhua Zhao0Xingliang Xu1Niandu Wu2Xiaodie Zhao3Jiangfeng Gong4Department of Applied Physics, Zhejiang University of Science and Technology, Hangzhou 310023, ChinaDepartment of Applied Physics, Zhejiang University of Science and Technology, Hangzhou 310023, ChinaNational Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaDepartment of Applied Physics, Zhejiang University of Science and Technology, Hangzhou 310023, ChinaCollege of Science, Hohai University, Nanjing 211199, ChinaDandelion-like CuCo<sub>2</sub>O<sub>4</sub> nanoflowers (CCO NFs) with ultrathin NiMn layered double hydroxide (LDH) shells were fabricated via a two-step hydrothermal method. The prepared CuCo<sub>2</sub>O<sub>4</sub>@NiMn LDH core/shell nanoflowers (CCO@NM LDH NFs) possessed a high specific surface area (~181 m<sup>2</sup>·g<sup>−1</sup>) with an average pore size of ~256 nm. Herein, the CCO@NM LDH NFs exhibited the typical battery-type electrode material with a specific capacity of 2156.53 F·g<sup>−1</sup> at a current density of 1 A·g<sup>−1</sup>. With the increase in current density, the rate capability retention was 68.3% at a current density of 10 A·g<sup>−1</sup>. In particular, the 94.6% capacity of CCO@NM LDH NFs remains after 2500 cycles at 5 A·g<sup>−1</sup>. An asymmetric supercapacitor (ASC) with CCO@NM LDH NFs//activated carbon (AC) demonstrates a remarkable capacitance of 303.11 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup> with excellent cycling stability. The coupling and synergistic effects of multi-valence transition metals provide a convenient channel for the electrochemical process, which is beneficial to spread widely within the realm of electrochemical energy storage.https://www.mdpi.com/2079-4991/13/4/730CuCo<sub>2</sub>O<sub>4</sub>@NiMn LDH nanoflowerscore/shellsynergistic effectbattery-typesupercapacitors |
| spellingShingle | Wenhua Zhao Xingliang Xu Niandu Wu Xiaodie Zhao Jiangfeng Gong Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor Nanomaterials CuCo<sub>2</sub>O<sub>4</sub>@NiMn LDH nanoflowers core/shell synergistic effect battery-type supercapacitors |
| title | Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor |
| title_full | Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor |
| title_fullStr | Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor |
| title_full_unstemmed | Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor |
| title_short | Dandelion-Like CuCo<sub>2</sub>O<sub>4</sub>@ NiMn LDH Core/Shell Nanoflowers for Excellent Battery-Type Supercapacitor |
| title_sort | dandelion like cuco sub 2 sub o sub 4 sub nimn ldh core shell nanoflowers for excellent battery type supercapacitor |
| topic | CuCo<sub>2</sub>O<sub>4</sub>@NiMn LDH nanoflowers core/shell synergistic effect battery-type supercapacitors |
| url | https://www.mdpi.com/2079-4991/13/4/730 |
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