{"title":"在胺化石墨烯上化学生长掺杂铌的五氧化二钒,用于全固态不对称超级电容器","authors":"","doi":"10.1016/j.mtsust.2024.100969","DOIUrl":null,"url":null,"abstract":"<div><p>In this investigation, niobium-doped vanadium pentoxide (Nb–V<sub>2</sub>O<sub>5</sub>) was grown on the surface of amine-functionalized graphene nanosheets (NH<sub>2</sub>-Gr) using an in-situ hydrothermal method and explored the hybrid material as a positive electrode for the fabrication of an all-solid-state asymmetric supercapacitor (ASC). We have used KOH-loaded poly(acrylonitrile-<em>co</em>-1-vinylimidazole) (KOH/P(AN-<em>Co</em>-VIM)) gel as a solid electrolyte-cum-separator and exfoliated graphene (XGnP) as a negative electrode in the ASC. The morphological analysis of the Nb–V<sub>2</sub>O<sub>5</sub>/NH<sub>2</sub>-Gr hybrid revealed homogeneous growth of Nb–V<sub>2</sub>O<sub>5</sub> on NH<sub>2</sub>-Gr nanosheets, while surface analysis confirmed a large fraction of mesopores with large surface areas in the hybrid. The hybrid electrode achieved a high specific capacitance of 1141.1 F/g at 1 A/g with 80.3% capacitance retention even after a 10-fold increase in current density, a significantly higher performance than a pure Nb–V<sub>2</sub>O<sub>5</sub> electrode. As-assembled solid-state ASC device delivered a high energy density of 79.39 Wh kg<sup>−1</sup> at a power density of 280.3 W kg<sup>−1</sup>, even though it retained high energy density at a higher power density of 12 kW kg<sup>−1</sup>. The ASC exhibited slow a self-discharge rate owing to the suppression of Ohmic leakage by the use of KOH/P(AN-<em>co</em>-VIM) gel electrolyte. Thus, the as-synthesized Nb–V<sub>2</sub>O<sub>5</sub>/NH<sub>2</sub>-Gr hybrid is an ideal alternative candidate for future supercapacitors.</p></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":null,"pages":null},"PeriodicalIF":7.1000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Chemical growth of Niobium-doped vanadium pentoxide on aminated graphene for all-solid-state asymmetric supercapacitors\",\"authors\":\"\",\"doi\":\"10.1016/j.mtsust.2024.100969\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this investigation, niobium-doped vanadium pentoxide (Nb–V<sub>2</sub>O<sub>5</sub>) was grown on the surface of amine-functionalized graphene nanosheets (NH<sub>2</sub>-Gr) using an in-situ hydrothermal method and explored the hybrid material as a positive electrode for the fabrication of an all-solid-state asymmetric supercapacitor (ASC). We have used KOH-loaded poly(acrylonitrile-<em>co</em>-1-vinylimidazole) (KOH/P(AN-<em>Co</em>-VIM)) gel as a solid electrolyte-cum-separator and exfoliated graphene (XGnP) as a negative electrode in the ASC. The morphological analysis of the Nb–V<sub>2</sub>O<sub>5</sub>/NH<sub>2</sub>-Gr hybrid revealed homogeneous growth of Nb–V<sub>2</sub>O<sub>5</sub> on NH<sub>2</sub>-Gr nanosheets, while surface analysis confirmed a large fraction of mesopores with large surface areas in the hybrid. The hybrid electrode achieved a high specific capacitance of 1141.1 F/g at 1 A/g with 80.3% capacitance retention even after a 10-fold increase in current density, a significantly higher performance than a pure Nb–V<sub>2</sub>O<sub>5</sub> electrode. As-assembled solid-state ASC device delivered a high energy density of 79.39 Wh kg<sup>−1</sup> at a power density of 280.3 W kg<sup>−1</sup>, even though it retained high energy density at a higher power density of 12 kW kg<sup>−1</sup>. The ASC exhibited slow a self-discharge rate owing to the suppression of Ohmic leakage by the use of KOH/P(AN-<em>co</em>-VIM) gel electrolyte. Thus, the as-synthesized Nb–V<sub>2</sub>O<sub>5</sub>/NH<sub>2</sub>-Gr hybrid is an ideal alternative candidate for future supercapacitors.</p></div>\",\"PeriodicalId\":18322,\"journal\":{\"name\":\"Materials Today Sustainability\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.1000,\"publicationDate\":\"2024-09-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Today Sustainability\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2589234724003051\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Sustainability","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2589234724003051","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Chemical growth of Niobium-doped vanadium pentoxide on aminated graphene for all-solid-state asymmetric supercapacitors
In this investigation, niobium-doped vanadium pentoxide (Nb–V2O5) was grown on the surface of amine-functionalized graphene nanosheets (NH2-Gr) using an in-situ hydrothermal method and explored the hybrid material as a positive electrode for the fabrication of an all-solid-state asymmetric supercapacitor (ASC). We have used KOH-loaded poly(acrylonitrile-co-1-vinylimidazole) (KOH/P(AN-Co-VIM)) gel as a solid electrolyte-cum-separator and exfoliated graphene (XGnP) as a negative electrode in the ASC. The morphological analysis of the Nb–V2O5/NH2-Gr hybrid revealed homogeneous growth of Nb–V2O5 on NH2-Gr nanosheets, while surface analysis confirmed a large fraction of mesopores with large surface areas in the hybrid. The hybrid electrode achieved a high specific capacitance of 1141.1 F/g at 1 A/g with 80.3% capacitance retention even after a 10-fold increase in current density, a significantly higher performance than a pure Nb–V2O5 electrode. As-assembled solid-state ASC device delivered a high energy density of 79.39 Wh kg−1 at a power density of 280.3 W kg−1, even though it retained high energy density at a higher power density of 12 kW kg−1. The ASC exhibited slow a self-discharge rate owing to the suppression of Ohmic leakage by the use of KOH/P(AN-co-VIM) gel electrolyte. Thus, the as-synthesized Nb–V2O5/NH2-Gr hybrid is an ideal alternative candidate for future supercapacitors.
期刊介绍:
Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science.
With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.