Lihua Zhang, Xiaoyang Cheng, Lingyan Li, Hao Wu, Jinfeng Zheng, Zhipeng Zhao, Lei Tan
{"title":"一步制备用于高性能不对称超级电容器的片状α-Ni(OH)2 复合多壁碳纳米管","authors":"Lihua Zhang, Xiaoyang Cheng, Lingyan Li, Hao Wu, Jinfeng Zheng, Zhipeng Zhao, Lei Tan","doi":"10.1007/s10853-024-10349-5","DOIUrl":null,"url":null,"abstract":"<div><p>The composite <i>α</i>-Ni(OH)<sub>2</sub>@CNT of multi-walled carbon nanotubes (CNT) and sheet-like <i>α</i>-Ni(OH)<sub>2</sub> was prepared by a one-step hydrothermal method. The structures and electrochemical properties of <i>α</i>-Ni(OH)<sub>2</sub>@CNT and <i>α</i>-Ni(OH)<sub>2</sub> have been studied in detail. Since hydroxylated CNT was used in this study, CNT provides the dual role of dispersion and conductivity for <i>α</i>-Ni(OH)<sub>2</sub>@CNT. The structural characterization shows that the thickness of <i>α</i>-Ni(OH)<sub>2</sub>@CNT nanosheets is significantly lower than that of <i>α</i>-Ni(OH)<sub>2</sub>, and the specific surface area and pore volume are significantly higher than that of <i>α</i>-Ni(OH)<sub>2</sub>, which provides more active sites for the composites. The electrochemical test results show that the specific capacitance and rate performance of <i>α</i>-Ni(OH)<sub>2</sub>@CNT are much higher than that of <i>α</i>-Ni(OH)<sub>2</sub>. The asymmetric supercapacitor (ASC) assembled with <i>α</i>-Ni(OH)<sub>2</sub>@CNT and activated carbon (AC) can provide an energy density of 42.8 Wh kg<sup>−1</sup> at a power density of 800 W kg<sup>−1</sup>, and the specific capacity can be maintained by 80% after 20,000 cycles, showing good application value. The theoretical calculation results further confirm that CNT increases the conductivity of <i>α</i>-Ni(OH)<sub>2</sub>@CNT. This work provides a low cost and effective modification method for the practical application of <i>α</i>-Ni(OH)<sub>2</sub>.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"59 42","pages":"19797 - 19810"},"PeriodicalIF":3.5000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"One-step preparation of sheet-like α-Ni(OH)2 composite multi-walled carbon nanotubes for high-performance asymmetric supercapacitors\",\"authors\":\"Lihua Zhang, Xiaoyang Cheng, Lingyan Li, Hao Wu, Jinfeng Zheng, Zhipeng Zhao, Lei Tan\",\"doi\":\"10.1007/s10853-024-10349-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The composite <i>α</i>-Ni(OH)<sub>2</sub>@CNT of multi-walled carbon nanotubes (CNT) and sheet-like <i>α</i>-Ni(OH)<sub>2</sub> was prepared by a one-step hydrothermal method. The structures and electrochemical properties of <i>α</i>-Ni(OH)<sub>2</sub>@CNT and <i>α</i>-Ni(OH)<sub>2</sub> have been studied in detail. Since hydroxylated CNT was used in this study, CNT provides the dual role of dispersion and conductivity for <i>α</i>-Ni(OH)<sub>2</sub>@CNT. The structural characterization shows that the thickness of <i>α</i>-Ni(OH)<sub>2</sub>@CNT nanosheets is significantly lower than that of <i>α</i>-Ni(OH)<sub>2</sub>, and the specific surface area and pore volume are significantly higher than that of <i>α</i>-Ni(OH)<sub>2</sub>, which provides more active sites for the composites. The electrochemical test results show that the specific capacitance and rate performance of <i>α</i>-Ni(OH)<sub>2</sub>@CNT are much higher than that of <i>α</i>-Ni(OH)<sub>2</sub>. The asymmetric supercapacitor (ASC) assembled with <i>α</i>-Ni(OH)<sub>2</sub>@CNT and activated carbon (AC) can provide an energy density of 42.8 Wh kg<sup>−1</sup> at a power density of 800 W kg<sup>−1</sup>, and the specific capacity can be maintained by 80% after 20,000 cycles, showing good application value. The theoretical calculation results further confirm that CNT increases the conductivity of <i>α</i>-Ni(OH)<sub>2</sub>@CNT. This work provides a low cost and effective modification method for the practical application of <i>α</i>-Ni(OH)<sub>2</sub>.</p></div>\",\"PeriodicalId\":645,\"journal\":{\"name\":\"Journal of Materials Science\",\"volume\":\"59 42\",\"pages\":\"19797 - 19810\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-10-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10853-024-10349-5\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10853-024-10349-5","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
One-step preparation of sheet-like α-Ni(OH)2 composite multi-walled carbon nanotubes for high-performance asymmetric supercapacitors
The composite α-Ni(OH)2@CNT of multi-walled carbon nanotubes (CNT) and sheet-like α-Ni(OH)2 was prepared by a one-step hydrothermal method. The structures and electrochemical properties of α-Ni(OH)2@CNT and α-Ni(OH)2 have been studied in detail. Since hydroxylated CNT was used in this study, CNT provides the dual role of dispersion and conductivity for α-Ni(OH)2@CNT. The structural characterization shows that the thickness of α-Ni(OH)2@CNT nanosheets is significantly lower than that of α-Ni(OH)2, and the specific surface area and pore volume are significantly higher than that of α-Ni(OH)2, which provides more active sites for the composites. The electrochemical test results show that the specific capacitance and rate performance of α-Ni(OH)2@CNT are much higher than that of α-Ni(OH)2. The asymmetric supercapacitor (ASC) assembled with α-Ni(OH)2@CNT and activated carbon (AC) can provide an energy density of 42.8 Wh kg−1 at a power density of 800 W kg−1, and the specific capacity can be maintained by 80% after 20,000 cycles, showing good application value. The theoretical calculation results further confirm that CNT increases the conductivity of α-Ni(OH)2@CNT. This work provides a low cost and effective modification method for the practical application of α-Ni(OH)2.
期刊介绍：
The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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