Fabrication of V2O5@Co-MOF as a cathode material with excellent rate capability

IF 8.6 2区 工程技术 Q1 ENERGY & FUELS
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Abstract

In recent years, the demand for energy storage devices with high-performance has propelled intense research efforts toward the development of promising supercapacitors. Among various electrode material, vanadium pentoxide (V2O5) has gained significant interest due to its excellent electrochemical properties. For the application of energy storage, V2O5 has intrinsic low electrical conductivity and limited cycle stability, makes its practical application limited. To overcome these challenges, the integration of V2O5 with metal-organic framework (MOF) nanocomposites has emerged as a promising strategy. This study focuses on the synthesis, characterization, and electrochemical analysis of V2O5 with zeolitic imidazolate framework-67 (ZIF-67) nanocomposites for supercapacitor applications. The V2O5@ZIF-67 hybrid material has been prepared by a simple in-situ chemical method. The XRD pattern of V2O5@ZIF 67 nanocomposites illustrate the combination of V2O5 with ZIF 67, as well as the subsequent growth of two phases without any modification to the parent. Within a potential window of 0 to 0.45 V, the synthesised V2O5@ZIF-67 in the three-electrode system exhibits a high specific capacitance of 913.06 F g−1 at a current density of 6 A g−1. The fabricated asymmetric supercapacitor (ASC) device delivers a superior energy density of 9.69 Wh kg−1 and power density of 2187.5 W kg−1.

制备具有优异速率能力的 V2O5@Co-MOF 阴极材料
近年来,对高性能储能设备的需求推动了人们对开发前景广阔的超级电容器的深入研究。在各种电极材料中,五氧化二钒(VO)因其优异的电化学性能而备受关注。对于储能应用而言,五氧化二钒固有的低导电性和有限的循环稳定性使其实际应用受到限制。为了克服这些挑战,VO 与金属有机框架(MOF)纳米复合材料的整合已成为一种很有前景的策略。本研究的重点是用于超级电容器应用的 VO 与沸石咪唑-67(ZIF-67)纳米复合材料的合成、表征和电化学分析。VO@ZIF-67 混合材料是通过简单的化学方法制备的。VO@ZIF-67 纳米复合材料的 XRD 图显示了 VO 与 ZIF-67 的结合,以及随后两相的生长,而母体未发生任何变化。在 0 至 0.45 V 的电位窗口内,三电极系统中合成的 VO@ZIF-67 在 6 A g 的电流密度下显示出 913.06 F g 的高比电容。
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来源期刊
Sustainable Materials and Technologies
Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment
CiteScore
13.40
自引率
4.20%
发文量
158
审稿时长
45 days
期刊介绍: Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.
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