Al intercalated ZnS nanosheets as anode for supercapattery application with wide operating potential window

IF 4.4 3区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Asmaa F. Kassem , Najam Ul Hassan , Ebraheem Abdu Musad Saleh , Rabbia Hasan , M.M. Moharam , Raed H. Althomali , Sana Ullah Asif , Kakul Husain , Gehan A. Hammouda
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Abstract

Selection of electrode material and operating potential window are important factor affecting the specific capacitance, energy density and stability of energy storage devices. Pristine ZnS has attracted the researchers to be focused for electrochemical performance due to its high theoretical capacitance, easy fabrication, low cost and environmental friendliness. Herein, we report successful fabrication of Al intercalated ZnS (Al1.6Zn80.9S17.5) nanosheets to optimize the structure, morphology and electrochemical performance as anode material for supercapattery application. Al-ZnS (Al1.6Zn80.9S17.5) is operated at wider potential window −0.3 to 0.8 to achieve an excellent specific capacitance of 1414 Fg−1 along with high energy density of about 90 Whkg−1 at 6540 WKg−1 power density, much higher than pristine ZnS (0 to 1.6 V, 705 Fg−1). The different current controlling mechanisms has also been analyzed by theoretical study using Dunn’s differentiation method. The reported wide potential window offers the opportunity to develop asymmetric supercapattery device that can operate at broaden potential window. Furthermore, Al-ZnS//rGO supercapattery device operating at 1.5 V potential is constructed using Al-ZnS as anode and rGO as cathode. Al-ZnS//rGO supercapattery device demonstrates an excellent specific capacitance of approximately 250 Fg−1 and energy density of about 140 Whkg−1 at 5800 WKg−1. The designed supercapattery device also exhibits 98 % columbic and capacitance retention of 90 %. The designed work elaborates on new guidelines for novel electrode material and explores the possibility of achieving the wide potential windows that can be utilized for practical energy storage applications.

Abstract Image

铝插层 ZnS 纳米片作为具有宽工作电位窗口的超级电池应用阳极
电极材料的选择和工作电位窗口是影响储能装置的比电容、能量密度和稳定性的重要因素。原始 ZnS 因其理论电容高、易于制造、成本低和环境友好而吸引了研究人员对其电化学性能的关注。在此,我们报告了铝插层 ZnS(Al1.6Zn80.9S17.5)纳米片的成功制备,以优化其结构、形态和电化学性能,作为超级电池应用的阳极材料。Al-ZnS(Al1.6Zn80.9S17.5)在更宽的电位窗口 -0.3 至 0.8 下工作,实现了 1414 Fg-1 的优异比电容,以及 6540 WKg-1 功率密度下约 90 Whkg-1 的高能量密度,远高于原始 ZnS(0 至 1.6 V,705 Fg-1)。理论研究还使用邓恩微分法分析了不同的电流控制机制。所报告的宽电位窗口为开发可在更宽电位窗口下工作的非对称超级电池器件提供了机会。此外,以 Al-ZnS 为阳极、rGO 为阴极,构建了在 1.5 V 电位下工作的 Al-ZnS//rGO 超级电池装置。Al-ZnS//rGO 超级电池装置的比电容约为 250 Fg-1,能量密度约为 140 Whkg-1(5800 WKg-1)。所设计的超级电池装置还具有 98% 的电容保持率和 90% 的电容保持率。设计工作阐述了新型电极材料的新准则,并探索了实现宽电位窗口的可能性,可用于实际的能量存储应用。
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来源期刊
Inorganic Chemistry Communications
Inorganic Chemistry Communications 化学-无机化学与核化学
CiteScore
5.50
自引率
7.90%
发文量
1013
审稿时长
53 days
期刊介绍: Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.
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