S. Rattanaveeranon, K. Jiamwattanapong, R. Suntako
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引用次数: 0
摘要
介绍了一种合成石墨烯-金属氧化物杂化材料的简便方法,该材料适用于超级电容器不锈钢片的涂层。将平均粒径为84.45±15.83 nm的氧化锌(ZnO)纳米颗粒沉积在还原氧化石墨烯(rGO)薄片上以获得假电容。甘薯灰碳源经浓硫酸处理后,表现出显著的双层电容量。在不锈钢电极表面涂覆60% CSP和40% ZnO/rGO混合物,厚度约为500µm,在电流密度为2 a g-1时,比电容达到323.12 F - 1,在3000次充放电循环后,循环稳定性为91.84%。该方法为提高超级电容器电容提供了一种新的经济有效的方法。
Enhancement of Specific Capacitance Using a Mixture of Sweet Potato Ash and Zinc Oxide Nanoparticles on Reduced Graphene Oxide Sheets
A straightforward approach for synthesizing graphene-metal oxide hybrid materials suitable for coating stainless steel sheets in supercapacitors is presented. Zinc oxide (ZnO) nanoparticles with an average particle size of 84.45 ± 15.83 nm were deposited onto reduced graphene oxide (rGO) sheets to impart pseudocapacitance. Carbon source from sweet potato ash (CSP), carbonized using concentrated sulfuric acid treatment, exhibited remarkable electric double-layer capacitance. Coating stainless steel electrodes with 60% CSP and 40% ZnO/rGO mixture with a thickness of approximately 500 µm yielded an excellent specific capacitance of 323.12 F g–1 at a current density of 2 A g–1 and cyclic stability with a retention rate of 91.84% after 3000 charging-discharging cycles. This approach offers a new cost-effective means of enhancing supercapacitor capacitance.
期刊介绍:
Russian Journal of Applied Chemistry (Zhurnal prikladnoi khimii) was founded in 1928. It covers all application problems of modern chemistry, including the structure of inorganic and organic compounds, kinetics and mechanisms of chemical reactions, problems of chemical processes and apparatus, borderline problems of chemistry, and applied research.