{"title":"水热合成氧化石墨烯/CoSO4复合材料作为高性能超级电容器电极:高压灭菌和非高压灭菌的影响","authors":"Nour Elhouda Arabi , Yasmina Bencheikh , Wafa Achour , Abdennour Hebbaz , Amar Manseri , Khaled Derkaoui , Toufik Hadjersi","doi":"10.1016/j.diamond.2025.112416","DOIUrl":null,"url":null,"abstract":"<div><div>Hybrid materials for electrode exhibit promising electrochemical performance in energy storage systems due to their excellent ion accessibility and high electrical conductivity. In this work, a novel rGO/CoSO<sub>4</sub>-H<sub>2</sub>O nanocomposite powder was synthesized via a simple one-pot hydrothermal process with and without autoclave at 90 °C for 24 h to investigate the influence of these synthesis conditions on their structural, morphological, and electrochemical properties. The X-ray diffraction (XRD) and Scanning electron microscope (SEM) studies revealed the presence of a hybrid structure that consists of polycrystalline CoSO<sub>4</sub>-H<sub>2</sub>O embedded on the rGO surface. The autoclaved sample exhibited a higher specific capacitance of 992.69 F/g at a current density of 2 A/g compared to the non-autoclaved one (654.92 F/g less at 2 A/g). However, both samples showed excellent stability (>93 %) over 7500 charge-discharge cycles. The material synthesis strategy presented in this study is facile, rapid, and simple. The results show that the autoclaving enhances the capacitive performance of rGO/CoSO₄-H<sub>2</sub>O composites by improving graphene oxide reduction and nanoparticle contact. It should be noted that the rGO/CoSO<sub>4</sub>-H<sub>2</sub>O composite prepared without autoclaving still shows excellent performance, outperforming those synthesized by other methods. Additionally, graphene can be reduced efficiently in a single hydrothermal step at low temperature without additives. The above results indicate that the hybrid rGO/CoSO<sub>4</sub>-H<sub>2</sub>O electrodes synthesized by this approach would be a promising candidate for practical application of high-performance SCs.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112416"},"PeriodicalIF":4.3000,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Facile hydrothermal synthesis of rGO/CoSO4 composite as high-performance supercapacitor electrode: Effect of autoclave and non-autoclave\",\"authors\":\"Nour Elhouda Arabi , Yasmina Bencheikh , Wafa Achour , Abdennour Hebbaz , Amar Manseri , Khaled Derkaoui , Toufik Hadjersi\",\"doi\":\"10.1016/j.diamond.2025.112416\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Hybrid materials for electrode exhibit promising electrochemical performance in energy storage systems due to their excellent ion accessibility and high electrical conductivity. In this work, a novel rGO/CoSO<sub>4</sub>-H<sub>2</sub>O nanocomposite powder was synthesized via a simple one-pot hydrothermal process with and without autoclave at 90 °C for 24 h to investigate the influence of these synthesis conditions on their structural, morphological, and electrochemical properties. The X-ray diffraction (XRD) and Scanning electron microscope (SEM) studies revealed the presence of a hybrid structure that consists of polycrystalline CoSO<sub>4</sub>-H<sub>2</sub>O embedded on the rGO surface. The autoclaved sample exhibited a higher specific capacitance of 992.69 F/g at a current density of 2 A/g compared to the non-autoclaved one (654.92 F/g less at 2 A/g). However, both samples showed excellent stability (>93 %) over 7500 charge-discharge cycles. The material synthesis strategy presented in this study is facile, rapid, and simple. The results show that the autoclaving enhances the capacitive performance of rGO/CoSO₄-H<sub>2</sub>O composites by improving graphene oxide reduction and nanoparticle contact. It should be noted that the rGO/CoSO<sub>4</sub>-H<sub>2</sub>O composite prepared without autoclaving still shows excellent performance, outperforming those synthesized by other methods. Additionally, graphene can be reduced efficiently in a single hydrothermal step at low temperature without additives. The above results indicate that the hybrid rGO/CoSO<sub>4</sub>-H<sub>2</sub>O electrodes synthesized by this approach would be a promising candidate for practical application of high-performance SCs.</div></div>\",\"PeriodicalId\":11266,\"journal\":{\"name\":\"Diamond and Related Materials\",\"volume\":\"156 \",\"pages\":\"Article 112416\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2025-05-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Diamond and Related Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S092596352500473X\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, COATINGS & FILMS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diamond and Related Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092596352500473X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}
引用次数: 0
摘要
杂化电极材料具有优异的离子可及性和高导电性,在储能系统中表现出良好的电化学性能。本文采用简单的一锅水热法制备了一种新型的还原氧化石墨烯/CoSO4-H2O纳米复合粉体,在90°C和不带高压灭菌器的条件下合成了24 h,研究了这些合成条件对其结构、形态和电化学性能的影响。x射线衍射(XRD)和扫描电镜(SEM)研究表明,在还原氧化石墨烯表面存在由多晶CoSO4-H2O组成的杂化结构。在电流密度为2 a /g时,高压灭菌样品的比电容比非高压灭菌样品高992.69 F/g(在2 a /g时,比非高压灭菌样品低654.92 F/g)。然而,这两种样品在7500次充放电循环中都表现出优异的稳定性(> 93%)。本研究提出的材料合成策略简便、快速、简单。结果表明,高压灭菌通过改善氧化石墨烯还原和纳米颗粒接触,提高了rGO/CoSO₄-H2O复合材料的电容性能。值得注意的是,未经高压灭菌制备的还原氧化石墨烯/CoSO4-H2O复合材料仍然表现出优异的性能,优于其他方法合成的复合材料。此外,石墨烯可以在低温下一次水热还原,无需添加添加剂。上述结果表明,通过该方法合成的rGO/CoSO4-H2O杂化电极将是高性能SCs实际应用的理想选择。
Facile hydrothermal synthesis of rGO/CoSO4 composite as high-performance supercapacitor electrode: Effect of autoclave and non-autoclave
Hybrid materials for electrode exhibit promising electrochemical performance in energy storage systems due to their excellent ion accessibility and high electrical conductivity. In this work, a novel rGO/CoSO4-H2O nanocomposite powder was synthesized via a simple one-pot hydrothermal process with and without autoclave at 90 °C for 24 h to investigate the influence of these synthesis conditions on their structural, morphological, and electrochemical properties. The X-ray diffraction (XRD) and Scanning electron microscope (SEM) studies revealed the presence of a hybrid structure that consists of polycrystalline CoSO4-H2O embedded on the rGO surface. The autoclaved sample exhibited a higher specific capacitance of 992.69 F/g at a current density of 2 A/g compared to the non-autoclaved one (654.92 F/g less at 2 A/g). However, both samples showed excellent stability (>93 %) over 7500 charge-discharge cycles. The material synthesis strategy presented in this study is facile, rapid, and simple. The results show that the autoclaving enhances the capacitive performance of rGO/CoSO₄-H2O composites by improving graphene oxide reduction and nanoparticle contact. It should be noted that the rGO/CoSO4-H2O composite prepared without autoclaving still shows excellent performance, outperforming those synthesized by other methods. Additionally, graphene can be reduced efficiently in a single hydrothermal step at low temperature without additives. The above results indicate that the hybrid rGO/CoSO4-H2O electrodes synthesized by this approach would be a promising candidate for practical application of high-performance SCs.
期刊介绍:
DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices.
The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.