{"title":"Porous coral-like nickel-cobalt-phosphide composited with graphene nanosheets: A supercapacitive behavior","authors":"","doi":"10.1016/j.est.2024.114083","DOIUrl":null,"url":null,"abstract":"<div><div>This research introduces the supercapacitive behavior of porous coral-like nickel-cobalt-phosphide composited with reduced graphene nanosheets (RGNs) using a straightforward one-step hydrothermal process. Several surface and electrochemical methods were used to follow the fabrication and study the electrochemical behavior and supercapacitive charge storage performance of the composite (NiCoP/RGNs) and its ancestors (NiP, CoP, NiP/RGNs, and CoP/RGNs). The effects of each component, NiP, Co, and graphene, on the performance of the composite were studied. In the composite with the optimum proportion of ingredients, the presence of NiP contributed to the high specific capacity, Co enhanced the intrinsic conductivity and electrochemical activity, and graphene significantly increased the surface area and electrical conductivity, leading to improved overall performance of the NiCoP/RGNs composite. The NiCoP/RGNs composite exhibited a uniformly shaped porous nanostructure with coral-like morphology and superior specific capacity of 982 C g<sup>−1</sup> at 1 A g<sup>−1</sup> (2455.6 F g<sup>−1</sup>), which can be attributed to its substantial specific surface area, notable intrinsic conductivity, and fleeting reversible faradic reaction properties. The asymmetric supercapacitor (ASC), made up of stainless steel modified with NiCoP/RGNs as a positive electrode and industrial active carbon as a negative electrode, revealed a high energy density of 54.63 W h kg<sup>−1</sup> at a power density of 749.49 W kg<sup>−1</sup> with 81 % capacity retention after 4000 cycles. The research may open up possibilities for the one-step, straightforward production of highly porous bimetallic phosphide materials, combined with graphene nanosheets, to store electrochemical energy.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X24036697","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
This research introduces the supercapacitive behavior of porous coral-like nickel-cobalt-phosphide composited with reduced graphene nanosheets (RGNs) using a straightforward one-step hydrothermal process. Several surface and electrochemical methods were used to follow the fabrication and study the electrochemical behavior and supercapacitive charge storage performance of the composite (NiCoP/RGNs) and its ancestors (NiP, CoP, NiP/RGNs, and CoP/RGNs). The effects of each component, NiP, Co, and graphene, on the performance of the composite were studied. In the composite with the optimum proportion of ingredients, the presence of NiP contributed to the high specific capacity, Co enhanced the intrinsic conductivity and electrochemical activity, and graphene significantly increased the surface area and electrical conductivity, leading to improved overall performance of the NiCoP/RGNs composite. The NiCoP/RGNs composite exhibited a uniformly shaped porous nanostructure with coral-like morphology and superior specific capacity of 982 C g−1 at 1 A g−1 (2455.6 F g−1), which can be attributed to its substantial specific surface area, notable intrinsic conductivity, and fleeting reversible faradic reaction properties. The asymmetric supercapacitor (ASC), made up of stainless steel modified with NiCoP/RGNs as a positive electrode and industrial active carbon as a negative electrode, revealed a high energy density of 54.63 W h kg−1 at a power density of 749.49 W kg−1 with 81 % capacity retention after 4000 cycles. The research may open up possibilities for the one-step, straightforward production of highly porous bimetallic phosphide materials, combined with graphene nanosheets, to store electrochemical energy.
本研究介绍了多孔珊瑚状镍-钴-磷化物与还原石墨烯纳米片(RGNs)复合的超级电容行为,该复合材料采用了简单的一步水热法工艺。研究人员采用多种表面和电化学方法跟踪了复合材料(NiCoP/RGNs)及其祖先(NiP、CoP、NiP/RGNs 和 CoP/RGNs)的制备过程,并研究了它们的电化学行为和超级电容性电荷存储性能。研究了各组分(NiP、Co 和石墨烯)对复合材料性能的影响。在最佳成分比例的复合材料中,NiP 的存在有助于提高比容量,Co 提高了本征电导率和电化学活性,而石墨烯则显著增加了比表面积和电导率,从而提高了 NiCoP/RGNs 复合材料的整体性能。镍钴磷/石墨烯复合材料呈现出均匀的多孔珊瑚状纳米结构,在 1 A g-1 时的比容量为 982 C g-1(2455.6 F g-1),这主要归功于其巨大的比表面积、显著的本征电导率和短暂的可逆法拉第反应特性。以镍钴锰酸锂/镍钴锰酸锂修饰的不锈钢为正极、工业活性炭为负极的非对称超级电容器(ASC)在功率密度为 749.49 W kg-1 的情况下,能量密度高达 54.63 W h kg-1,4000 次循环后容量保持率达 81%。这项研究为一步到位、直接生产结合石墨烯纳米片的高多孔双金属磷化物材料来存储电化学能量提供了可能。
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.