用于超级电容器的 BaO/NiO/rGO 纳米复合材料的合成

Nallathambi Anisha, R. Yuvakkumar, Ganesan Ravi, M. Thambidurai, Dhayalan Velauthapillai
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摘要

摘要 考虑到全球能源危机,对替代能源的需求正在逐步上升。鉴于能源资源日益减少,我们转向可再生替代能源。将这些能源储存起来以备将来使用仍然是一项紧迫的任务。理想的存储设备应具有更高的能量密度、功率密度和循环稳定性。在这项研究中,我们通过具有成本效益的共沉淀法合成了金属氧化物与碳基材料的纳米复合材料,如 BaO/NiO、BaO/NiO/rGO,并研究了它们在超级电容器应用中的性能比较。对上述合成材料进行了各种表征。X 射线衍射(XRD)研究证实了纳米复合材料的形成及其结晶度。通过 JCPDS 证书编号 26-0178 确认 BaO 为四方结构,通过 JCPDS 证书编号 89-7390 确认 NiO 为斜方结构。为了研究电极材料的电化学行为及其循环稳定性,我们进行了循环伏安法(CV)、电静态充放电法(GCD)和电化学阻抗谱法(EIS)研究。在 0.3 A/g 的 1 M KOH 水溶液中,BaO/NiO/rGO 具有 1072 F/g 的比电容。在 1.6 V 的充电电位下,混合器件的电化学作用在 0.3 A/g 时显示出 224 F/g。即使在 10 A/g 条件下循环 5000 次,不对称混合超级电容器的电容保持率仍高达 97.6%,这表明所制备的纳米复合材料在储能应用中具有卓越的循环稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of BaO/NiO/rGO nanocomposite for supercapacitor application
Abstract Considering the global energy crisis, alternative energy resources requirement is rising gradually. In light of dwindling energy resources, we turn to renewable alternatives. Storing this energy for future utilization remains a pressing endeavor. The ideal storage device should possess intensified energy density, power density, and cyclic stability. In this study, we have synthesized metal oxide with carbon based material nanocomposite such as BaO/NiO, BaO/NiO/rGO through cost effective co-precipitation method and their comparative performance for supercapacitor application were studied. Various characterizations were taken for the above synthesized material. X-ray diffraction (XRD) study confirmed the material formation and their crystallinity of the nanocomposite. BaO has tetragonal structure which was confirmed through JCPDS card number 26-0178 and NiO has rhombohedral structure which was confirmed through JCPDS card number 89-7390. To study electrochemical behaviour of electrode material and its cyclic stability, cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) studies was executed. BaO/NiO/rGO possesses 1072 F/g specific capacitance at 0.3 A/g in aqueous 1 M KOH. The electrochemical action of hybrid device was setup and it revealed 224 F/g at 0.3 A/g within the charging potential of 1.6 V. Capacitive retention of 97.6 % was achieved by asymmetric hybrid supercapacitor even after 5000 cycles at 10 A/g, this shows prepared nanocomposite exceptional cyclic stability in energy storage application.
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