{"title":"Probing the effect of electrolyte ions on the electrochemical performance of nickel-based metal-organic frameworks","authors":"Shiwani Khokhar , Prakash Chand , Hardeep Anand","doi":"10.1016/j.matchemphys.2024.130144","DOIUrl":null,"url":null,"abstract":"<div><div>Understanding the influence of electrolyte ions dimension on electrochemical performance is essential for advancing the development of superior MOF-based devices. Nanosheet-type nickel metal-organic frameworks (Ni-BDC) have emerged as exceptional materials for next-generation supercapacitors. To address this, we investigate the energy storage performance of nickel-1,4-benzene dicarboxylate (Ni-BDC) via an elementary solvothermal approach. The primary objective of the present investigation was to elucidate the influence of distinct cationic components within aqueous electrolytes on the electrochemical efficiency of Ni-BDC. The electrochemical examination was performed using a three-electrode setup in different aqueous electrolytes, comprising LiOH, NaOH, and KOH, each with a concentration of 2 M. The calculated specific capacitance value of Ni-BDC increases in the order of 204 F/g (for LiOH) < 290 F/g (for NaOH) < 1526 F/g (for KOH) at 1 A/g due to the lowest hydration sphere radius, greater ionic mobility of K<sup>+</sup> ion. The material performed better electrochemically in KOH electrolyte with 87 % capacitance preservation. Additionally, an asymmetric supercapacitor (ASSC) device was built using activated carbon (AC) as the negative electrode and nanosheet-like Ni-BDC as the positive electrode. The device, operating within a 1.4 V potential window, demonstrated a capacitance of 39.4 F/g at a current density of 1 A/g. The ASSC device maintained 85 % of its cyclic stability over 4000 charge-discharge cycles at a current density of 8 A/g. This study underscores the vital importance of selecting the optimal electrolyte to significantly enhance the electrochemical performance of Ni-BDC electrode material.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"330 ","pages":"Article 130144"},"PeriodicalIF":4.3000,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Chemistry and Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0254058424012720","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Understanding the influence of electrolyte ions dimension on electrochemical performance is essential for advancing the development of superior MOF-based devices. Nanosheet-type nickel metal-organic frameworks (Ni-BDC) have emerged as exceptional materials for next-generation supercapacitors. To address this, we investigate the energy storage performance of nickel-1,4-benzene dicarboxylate (Ni-BDC) via an elementary solvothermal approach. The primary objective of the present investigation was to elucidate the influence of distinct cationic components within aqueous electrolytes on the electrochemical efficiency of Ni-BDC. The electrochemical examination was performed using a three-electrode setup in different aqueous electrolytes, comprising LiOH, NaOH, and KOH, each with a concentration of 2 M. The calculated specific capacitance value of Ni-BDC increases in the order of 204 F/g (for LiOH) < 290 F/g (for NaOH) < 1526 F/g (for KOH) at 1 A/g due to the lowest hydration sphere radius, greater ionic mobility of K+ ion. The material performed better electrochemically in KOH electrolyte with 87 % capacitance preservation. Additionally, an asymmetric supercapacitor (ASSC) device was built using activated carbon (AC) as the negative electrode and nanosheet-like Ni-BDC as the positive electrode. The device, operating within a 1.4 V potential window, demonstrated a capacitance of 39.4 F/g at a current density of 1 A/g. The ASSC device maintained 85 % of its cyclic stability over 4000 charge-discharge cycles at a current density of 8 A/g. This study underscores the vital importance of selecting the optimal electrolyte to significantly enhance the electrochemical performance of Ni-BDC electrode material.
期刊介绍:
Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.