新型(AlCuCoFeMnNi)3O4 高熵尖晶石氧化物与不同碳基添加剂混合的超级电容器电极性能研究

Energy Storage Pub Date : 2024-07-18 DOI:10.1002/est2.70002
Amit K. Gupta, Ankit Kumar, Mina Marndi, Neeraj K. Giri, Rohit R. Shahi
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引用次数: 0

摘要

本研究旨在通过溶胶凝胶法合成一种新型(AlCuCoFeMnNi)3O4 型高熵尖晶石氧化物,并研究不同碳基添加剂对电荷存储性能的影响。通过对合成样品进行详细的 X 射线衍射分析,证实了 [B(AB)O4] 型反尖晶石相的形成。合成的尖晶石相的空间群为 Fd-3m,晶格参数为 8.2697 Å。合成的高熵氧化物(HEO)相镍、钴和铁共存于 +2 和 +3 态。同时,通过 X 射线光电子能谱证实,铜处于 +2 态,铝处于 +3 态,锰处于 +3 和 +4 态。在 2 M KOH 电解质水溶液中,在两个不同的电位窗口(如 -0.2 至 0.4 V 和 0.0 至 0.5 V)内,通过三电极设置测量了合成 HEO 的电化学电荷存储性能。不同的碳基导电材料,如乙炔黑、还原氧化石墨烯(RGO),以及用过的干电池碳电极(CP)经过 10 小时球磨得到的碳颗粒。当电位窗口从 -0.2 到 0.4 到 0 到 0.5 V 变化时,电荷存储机制从电化学双层电容变为伪电容型。在扫描速率为 5 mV/s 时,乙炔黑、RGO 和 CP 制成的 HEO 电极的比电容值分别为 32.67、7.50 和 4.58 F/g 以及 30.68、16.33 和 9.05 F/g,电位窗口分别为 -0.2 至 0.4 V 和 0 至 0.5 V。在 100 mV/s 的扫描速率下,对所开发的三种电极的循环性能进行了 1000 次测量,结果发现,由 HEO 与乙炔黑、RGO 和 CP 制成的电极的循环性能分别为 94%、98% 和 99%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Studies on supercapacitor electrode performance of novel (AlCuCoFeMnNi)3O4 high entropy spinel oxide admixed with different carbon-based additives

The present investigation aims to synthesize a novel (AlCuCoFeMnNi)3O4 type high entropy spinel oxide through the sol-gel and investigate the effect of different carbon-based additives on charge storage performance. The formation of the inverse spinel phase of [B(AB)O4] type inverse spinel phase was confirmed through the detailed x-ray diffraction analysis of the synthesized sample. The synthesized spinel phase was indexed with the space group of Fd−3m and has a lattice parameter of 8.2697 Å. The synthesized high entropy oxide (HEO) phase Ni, Co, and Fe coexists in +2 and +3 states. At the same time, Cu in +2 state, Al in +3 state, and Mn in +3 and +4 states confirmed through x-ray photoelectron spectroscopy. The electrochemical charge storage performance of synthesized HEO was measured through the three-electrode setup in 2 M KOH aqueous electrolyte solution in two different potential windows, such as −0.2 to 0.4 V and 0.0 to 0.5 V. Different carbon-based conducting materials such as acetylene black, reduced graphene oxide (RGO), and carbon particles obtained from 10-hour ball-milling of used dry cell carbon electrode (CP). The charge storage mechanism changes from electrochemical double layer capacitance to pseudocapacitive type as the potential window varies from −0.2 to 0.4 to 0 to 0.5 V. The value of specific capacitance for an electrode made of HEO with acetylene black, RGO, and CP was found to be 32.67, 7.50, and 4.58 F/g and 30.68, 16.33, and 9.05 F/g in the potential window of −0.2 to 0.4 V and 0 to 0.5 V at a scan rate of 5 mV/s, respectively. The cyclic performance of the developed three electrodes was measured at a scan rate of 100 mV/s for 1000 cycles, and it was found to be 94%, 98%, and 99% for electrodes made of HEO with acetylene black, RGO, and CP, respectively.

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