Xiaochan Liu , Tingwei Wang , Xibin Yi , Jing Zhang , Xinfu Zhao , Sijia Liu , Sheng Cui
{"title":"CA@MnO2核壳异质结构在超级电容器中的应用","authors":"Xiaochan Liu , Tingwei Wang , Xibin Yi , Jing Zhang , Xinfu Zhao , Sijia Liu , Sheng Cui","doi":"10.1016/j.cej.2025.161639","DOIUrl":null,"url":null,"abstract":"<div><div>Constructing a core–shell structure is an effective way to improve the performance of electrode materials for supercapacitors. The existing core–shell structures frequently confront common issues such as weak interfacial bonding, structural instability at high temperatures, and the difficulty of balancing conductivity and active sites. In this article, we employ a low-temperature liquid-phase method to synthesize manganese oxide (MnO<sub>2</sub>) coated on carbon aerogel (CA) heterostructure. Mn<sup>2+</sup> ions go through the redox reaction under weak alkaline conditions, controllable grow on the surface of carbon aerogels’ skeleton, and synthesis a uniform manganese oxide shell layer. CA@MnO<sub>2</sub> not only possesses a three-dimensional porous structure but also has an enriched aperture range, and a high specific surface area. Meanwhile, the existence of the MnO<sub>2</sub> coating layer can enhance the structural stability of the CA during high-temperature calcination. The core–shell aerogels are applied to supercapacitors and exhibit high specific capacitance (895.0 F/g) and excellent cycling performance. When utilized in the symmetrical double-electrode supercapacitor, it has a wide working voltage range (2.6 V), and high energy density (144.2 Wh/kg) at the power density of 250.0 W/kg, presenting outstanding electro performance. The calculation results indicate the MnO<sub>2</sub> shell layer and the CA core have a distinct hetero-interface and strong interactions, which can improve the conductivity and increase the OH adsorption energy. The core–shell heterostructure CA@MnO<sub>2</sub> is a promising supercapacitor electrode.</div></div>","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"510 ","pages":"Article 161639"},"PeriodicalIF":13.2000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Construction of CA@MnO2 core-shell heterostructure for supercapacitor applications\",\"authors\":\"Xiaochan Liu , Tingwei Wang , Xibin Yi , Jing Zhang , Xinfu Zhao , Sijia Liu , Sheng Cui\",\"doi\":\"10.1016/j.cej.2025.161639\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Constructing a core–shell structure is an effective way to improve the performance of electrode materials for supercapacitors. The existing core–shell structures frequently confront common issues such as weak interfacial bonding, structural instability at high temperatures, and the difficulty of balancing conductivity and active sites. In this article, we employ a low-temperature liquid-phase method to synthesize manganese oxide (MnO<sub>2</sub>) coated on carbon aerogel (CA) heterostructure. Mn<sup>2+</sup> ions go through the redox reaction under weak alkaline conditions, controllable grow on the surface of carbon aerogels’ skeleton, and synthesis a uniform manganese oxide shell layer. CA@MnO<sub>2</sub> not only possesses a three-dimensional porous structure but also has an enriched aperture range, and a high specific surface area. Meanwhile, the existence of the MnO<sub>2</sub> coating layer can enhance the structural stability of the CA during high-temperature calcination. The core–shell aerogels are applied to supercapacitors and exhibit high specific capacitance (895.0 F/g) and excellent cycling performance. When utilized in the symmetrical double-electrode supercapacitor, it has a wide working voltage range (2.6 V), and high energy density (144.2 Wh/kg) at the power density of 250.0 W/kg, presenting outstanding electro performance. The calculation results indicate the MnO<sub>2</sub> shell layer and the CA core have a distinct hetero-interface and strong interactions, which can improve the conductivity and increase the OH adsorption energy. The core–shell heterostructure CA@MnO<sub>2</sub> is a promising supercapacitor electrode.</div></div>\",\"PeriodicalId\":270,\"journal\":{\"name\":\"Chemical Engineering Journal\",\"volume\":\"510 \",\"pages\":\"Article 161639\"},\"PeriodicalIF\":13.2000,\"publicationDate\":\"2025-03-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Engineering Journal\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1385894725024611\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Journal","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1385894725024611","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Construction of CA@MnO2 core-shell heterostructure for supercapacitor applications
Constructing a core–shell structure is an effective way to improve the performance of electrode materials for supercapacitors. The existing core–shell structures frequently confront common issues such as weak interfacial bonding, structural instability at high temperatures, and the difficulty of balancing conductivity and active sites. In this article, we employ a low-temperature liquid-phase method to synthesize manganese oxide (MnO2) coated on carbon aerogel (CA) heterostructure. Mn2+ ions go through the redox reaction under weak alkaline conditions, controllable grow on the surface of carbon aerogels’ skeleton, and synthesis a uniform manganese oxide shell layer. CA@MnO2 not only possesses a three-dimensional porous structure but also has an enriched aperture range, and a high specific surface area. Meanwhile, the existence of the MnO2 coating layer can enhance the structural stability of the CA during high-temperature calcination. The core–shell aerogels are applied to supercapacitors and exhibit high specific capacitance (895.0 F/g) and excellent cycling performance. When utilized in the symmetrical double-electrode supercapacitor, it has a wide working voltage range (2.6 V), and high energy density (144.2 Wh/kg) at the power density of 250.0 W/kg, presenting outstanding electro performance. The calculation results indicate the MnO2 shell layer and the CA core have a distinct hetero-interface and strong interactions, which can improve the conductivity and increase the OH adsorption energy. The core–shell heterostructure CA@MnO2 is a promising supercapacitor electrode.
期刊介绍:
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.