{"title":"用于先进超级电容器的多金属配位聚合物衍生多孔 NiO/CuCo2O4 纳米晶异质结复合材料","authors":"","doi":"10.1016/j.est.2024.114150","DOIUrl":null,"url":null,"abstract":"<div><div>NiO is considered as a promising electrode material owing to its high theoretical capacitance. However, the inherent low conductivity and huge volume expansion during cycling limit its practical application. Constructing composites is considered as an effective way to improve charge transfer efficiency and enhance electrochemical performance. Therefore, many researchers are devoted to combining NiO with other materials to build composites to solve this problem. However, the preparation of composites with uniformly distributed heterojunctions in a simple way remains a major challenge. Herein, porous NiO/CuCo<sub>2</sub>O<sub>4</sub> composites with uniformly distributed heterojunctions were fabricated via a facile and cost-effective method. Benefiting from the porous structure and the synergistic effect of NiO and CuCo<sub>2</sub>O<sub>4</sub>, the NiO/CuCo<sub>2</sub>O<sub>4</sub>–450 electrode exhibits outstanding specific capacitance of 962 F g<sup>−1</sup> at the current density of 1 A g<sup>−1</sup>. Additionally, with porous NiO/CuCo<sub>2</sub>O<sub>4</sub>–450 composites as anode and active carbon (AC) as cathode, the asymmetric supercapacitor (ASC) provides an energy density of 25.17 Wh kg<sup>−1</sup> at a power density of 400 W kg<sup>−1</sup> and an excellent cycle life. This study provides a facile and favourable strategy for the preparation of composites with distinguished electrochemical properties.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Porous NiO/CuCo2O4 nanocrystalline heterojunction composites derived from polymetallic coordination polymers for advanced supercapacitor\",\"authors\":\"\",\"doi\":\"10.1016/j.est.2024.114150\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>NiO is considered as a promising electrode material owing to its high theoretical capacitance. However, the inherent low conductivity and huge volume expansion during cycling limit its practical application. Constructing composites is considered as an effective way to improve charge transfer efficiency and enhance electrochemical performance. Therefore, many researchers are devoted to combining NiO with other materials to build composites to solve this problem. However, the preparation of composites with uniformly distributed heterojunctions in a simple way remains a major challenge. Herein, porous NiO/CuCo<sub>2</sub>O<sub>4</sub> composites with uniformly distributed heterojunctions were fabricated via a facile and cost-effective method. Benefiting from the porous structure and the synergistic effect of NiO and CuCo<sub>2</sub>O<sub>4</sub>, the NiO/CuCo<sub>2</sub>O<sub>4</sub>–450 electrode exhibits outstanding specific capacitance of 962 F g<sup>−1</sup> at the current density of 1 A g<sup>−1</sup>. Additionally, with porous NiO/CuCo<sub>2</sub>O<sub>4</sub>–450 composites as anode and active carbon (AC) as cathode, the asymmetric supercapacitor (ASC) provides an energy density of 25.17 Wh kg<sup>−1</sup> at a power density of 400 W kg<sup>−1</sup> and an excellent cycle life. This study provides a facile and favourable strategy for the preparation of composites with distinguished electrochemical properties.</div></div>\",\"PeriodicalId\":15942,\"journal\":{\"name\":\"Journal of energy storage\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2024-10-16\",\"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/S2352152X24037368\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X24037368","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
摘要
由于理论电容较高,氧化镍被认为是一种前景广阔的电极材料。然而,其固有的低电导率和循环过程中巨大的体积膨胀限制了它的实际应用。构建复合材料被认为是提高电荷转移效率和增强电化学性能的有效方法。因此,许多研究人员致力于将氧化镍与其他材料结合起来制备复合材料,以解决这一问题。然而,如何以简单的方法制备具有均匀分布异质结的复合材料仍是一大挑战。本文通过一种简便、经济的方法制备了具有均匀分布异质结的多孔 NiO/CuCo2O4 复合材料。得益于多孔结构以及 NiO 和 CuCo2O4 的协同效应,NiO/CuCo2O4-450 电极在 1 A g-1 的电流密度下表现出了 962 F g-1 的出色比电容。此外,以多孔 NiO/CuCo2O4-450 复合材料为阳极、活性碳(AC)为阴极的非对称超级电容器(ASC)在功率密度为 400 W kg-1 时可提供 25.17 Wh kg-1 的能量密度和出色的循环寿命。这项研究为制备具有优异电化学性能的复合材料提供了一种简便而有利的策略。
Porous NiO/CuCo2O4 nanocrystalline heterojunction composites derived from polymetallic coordination polymers for advanced supercapacitor
NiO is considered as a promising electrode material owing to its high theoretical capacitance. However, the inherent low conductivity and huge volume expansion during cycling limit its practical application. Constructing composites is considered as an effective way to improve charge transfer efficiency and enhance electrochemical performance. Therefore, many researchers are devoted to combining NiO with other materials to build composites to solve this problem. However, the preparation of composites with uniformly distributed heterojunctions in a simple way remains a major challenge. Herein, porous NiO/CuCo2O4 composites with uniformly distributed heterojunctions were fabricated via a facile and cost-effective method. Benefiting from the porous structure and the synergistic effect of NiO and CuCo2O4, the NiO/CuCo2O4–450 electrode exhibits outstanding specific capacitance of 962 F g−1 at the current density of 1 A g−1. Additionally, with porous NiO/CuCo2O4–450 composites as anode and active carbon (AC) as cathode, the asymmetric supercapacitor (ASC) provides an energy density of 25.17 Wh kg−1 at a power density of 400 W kg−1 and an excellent cycle life. This study provides a facile and favourable strategy for the preparation of composites with distinguished electrochemical properties.
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.