{"title":"Carbon-Coating Co-Doped α-Ni(OH)2 for High-Performance Supercapacitors","authors":"Miao Wang, Peng Zheng","doi":"10.1007/s11837-024-06868-w","DOIUrl":null,"url":null,"abstract":"<p>A carbon-coated Co-doped α-Ni(OH)<sub>2</sub> nano-sheet was synthesized by a one-pot co-precipitation method. To confirm the existence of the carbon coating and the Co doping, TEM, EDS, XPS, and Raman analyses were employed, and, to verify their roles in the electrochemical process, comparison experiments were carried out. The results showed that the carbon coating layer improves the conductivity of α-Ni(OH)<sub>2</sub>, and the doped Co enhances the structural stability of α-Ni(OH)<sub>2</sub> during repeated cycles. Benefiting from these merits, the composite showed good performance as the electrode in a supercapacitor. At three electrodes aqueous, the specific capacitance approached 1865 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, and 95% capacitance was reserved after 2000 cycles. Furthermore, asymmetric supercapacitor testing was also conducted.</p>","PeriodicalId":605,"journal":{"name":"JOM","volume":"17 1","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JOM","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s11837-024-06868-w","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A carbon-coated Co-doped α-Ni(OH)2 nano-sheet was synthesized by a one-pot co-precipitation method. To confirm the existence of the carbon coating and the Co doping, TEM, EDS, XPS, and Raman analyses were employed, and, to verify their roles in the electrochemical process, comparison experiments were carried out. The results showed that the carbon coating layer improves the conductivity of α-Ni(OH)2, and the doped Co enhances the structural stability of α-Ni(OH)2 during repeated cycles. Benefiting from these merits, the composite showed good performance as the electrode in a supercapacitor. At three electrodes aqueous, the specific capacitance approached 1865 F g−1 at 1 A g−1, and 95% capacitance was reserved after 2000 cycles. Furthermore, asymmetric supercapacitor testing was also conducted.
通过一锅共沉淀法合成了碳涂层掺杂 Co 的 α-Ni(OH)2纳米片。为了证实碳涂层和 Co 掺杂的存在，采用了 TEM、EDS、XPS 和拉曼分析，并进行了对比实验来验证它们在电化学过程中的作用。结果表明，碳涂层提高了α-Ni(OH)2 的导电性，而掺杂的 Co 则增强了α-Ni(OH)2 在反复循环过程中的结构稳定性。得益于这些优点，该复合材料作为超级电容器的电极表现出了良好的性能。在三电极水溶液中，1 A g-1 时的比电容接近 1865 F g-1，循环 2000 次后仍能保持 95% 的电容。此外，还进行了不对称超级电容器测试。
期刊介绍：
JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.
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