Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors
Here, rational design electrodes are fabricated by mixing MXene with an aqueous solution of chloroauric acid (HAuCl<sub>4</sub>). In order to prevent MXene from self-restacking, the groups of -OH on the surface of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub&g...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/19/3294 |
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| author | Beenish Mustafa Wengang Lu Zhiyuan Wang Fuzhuo Lian Andy Shen Bing Yang Jun Yuan Chang Wu Yangbowen Liu Weiwei Hu Lei Wang Geliang Yu |
| author_facet | Beenish Mustafa Wengang Lu Zhiyuan Wang Fuzhuo Lian Andy Shen Bing Yang Jun Yuan Chang Wu Yangbowen Liu Weiwei Hu Lei Wang Geliang Yu |
| author_sort | Beenish Mustafa |
| collection | DOAJ |
| description | Here, rational design electrodes are fabricated by mixing MXene with an aqueous solution of chloroauric acid (HAuCl<sub>4</sub>). In order to prevent MXene from self-restacking, the groups of -OH on the surface of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> nanosheets underwent a one-step simultaneous self-reduction from AuCl<sub>4</sub>-, generating spaces for rapid ion transit. Additionally, by using this procedure, MXene’s surface oxidation can be decreased while preserving its physio-chemical properties. The interlayered MX/Au NPs that have been obtained are combined into a conducting network structure that offers more active electrochemical sites and improved mass transfer at the electrode–electrolyte interface, both of which promote quick electron transfer during electrochemical reactions and excellent structural durability. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-AuNPs film thus demonstrated a rate performance that was preferable to that of pure Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> film. According to the results of the characterization, the AuNPs effectively adorn the MXene nanosheets. Due to the renowned pseudocapacitance charge storage mechanism, MXene-based electrode materials also work well as supercapacitors in sulfuric acid, which is why MXene AuNPs electrodes have been tested in 3 M and 1 M H<sub>2</sub>SO<sub>4</sub>. The symmetric supercapacitors made of MXene and AuNPs have shown exceptional specific capacitance of 696.67 Fg<sup>−1</sup> at 5 mVs<sup>−1</sup> in 3 M H<sub>2</sub>SO<sub>4</sub> electrolyte, and they can sustain 90% of their original capacitance for 5000 cycles. The highest energy and power density of this device, which operates within a 1.2 V potential window, are 138.4 Wh kg<sup>−1</sup> and 2076 W kg<sup>−1</sup>, respectively. These findings offer a productive method for creating high-performance metal oxide-based symmetric capacitors and a straightforward, workable approach for improving MXene-based electrode designs, which can be applied to other electro-chemical systems that are ion transport-restricted, such as metal ion batteries and catalysis. |
| first_indexed | 2024-03-09T21:23:12Z |
| format | Article |
| id | doaj.art-e3bd26ec7ff74cfda17f55c3f1cdfb6b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T21:23:12Z |
| publishDate | 2022-09-01 |
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| series | Nanomaterials |
| spelling | doaj.art-e3bd26ec7ff74cfda17f55c3f1cdfb6b2023-11-23T21:17:44ZengMDPI AGNanomaterials2079-49912022-09-011219329410.3390/nano12193294Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric SupercapacitorsBeenish Mustafa0Wengang Lu1Zhiyuan Wang2Fuzhuo Lian3Andy Shen4Bing Yang5Jun Yuan6Chang Wu7Yangbowen Liu8Weiwei Hu9Lei Wang10Geliang Yu11National Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing 210093, ChinaNational Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing 210093, ChinaNational Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing 210093, ChinaNational Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing 210093, ChinaHubei Jiufengshan Laboratory, Wuhan 430206, ChinaHubei Jiufengshan Laboratory, Wuhan 430206, ChinaHubei Jiufengshan Laboratory, Wuhan 430206, ChinaHubei Jiufengshan Laboratory, Wuhan 430206, ChinaHubei Jiufengshan Laboratory, Wuhan 430206, ChinaJiangsu Industrial Technology Research Institute, Nanjing 210093, ChinaNational Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing 210093, ChinaNational Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing 210093, ChinaHere, rational design electrodes are fabricated by mixing MXene with an aqueous solution of chloroauric acid (HAuCl<sub>4</sub>). In order to prevent MXene from self-restacking, the groups of -OH on the surface of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> nanosheets underwent a one-step simultaneous self-reduction from AuCl<sub>4</sub>-, generating spaces for rapid ion transit. Additionally, by using this procedure, MXene’s surface oxidation can be decreased while preserving its physio-chemical properties. The interlayered MX/Au NPs that have been obtained are combined into a conducting network structure that offers more active electrochemical sites and improved mass transfer at the electrode–electrolyte interface, both of which promote quick electron transfer during electrochemical reactions and excellent structural durability. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-AuNPs film thus demonstrated a rate performance that was preferable to that of pure Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> film. According to the results of the characterization, the AuNPs effectively adorn the MXene nanosheets. Due to the renowned pseudocapacitance charge storage mechanism, MXene-based electrode materials also work well as supercapacitors in sulfuric acid, which is why MXene AuNPs electrodes have been tested in 3 M and 1 M H<sub>2</sub>SO<sub>4</sub>. The symmetric supercapacitors made of MXene and AuNPs have shown exceptional specific capacitance of 696.67 Fg<sup>−1</sup> at 5 mVs<sup>−1</sup> in 3 M H<sub>2</sub>SO<sub>4</sub> electrolyte, and they can sustain 90% of their original capacitance for 5000 cycles. The highest energy and power density of this device, which operates within a 1.2 V potential window, are 138.4 Wh kg<sup>−1</sup> and 2076 W kg<sup>−1</sup>, respectively. These findings offer a productive method for creating high-performance metal oxide-based symmetric capacitors and a straightforward, workable approach for improving MXene-based electrode designs, which can be applied to other electro-chemical systems that are ion transport-restricted, such as metal ion batteries and catalysis.https://www.mdpi.com/2079-4991/12/19/3294symmetric supercapacitorsMXenechloroauric acid (HauCl<sub>4</sub>)energy densitypower densityaqueous electrolyte |
| spellingShingle | Beenish Mustafa Wengang Lu Zhiyuan Wang Fuzhuo Lian Andy Shen Bing Yang Jun Yuan Chang Wu Yangbowen Liu Weiwei Hu Lei Wang Geliang Yu Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors Nanomaterials symmetric supercapacitors MXene chloroauric acid (HauCl<sub>4</sub>) energy density power density aqueous electrolyte |
| title | Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors |
| title_full | Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors |
| title_fullStr | Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors |
| title_full_unstemmed | Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors |
| title_short | Ultrahigh Energy and Power Densities of d-MXene-Based Symmetric Supercapacitors |
| title_sort | ultrahigh energy and power densities of d mxene based symmetric supercapacitors |
| topic | symmetric supercapacitors MXene chloroauric acid (HauCl<sub>4</sub>) energy density power density aqueous electrolyte |
| url | https://www.mdpi.com/2079-4991/12/19/3294 |
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