材料科学
乙醇酸
超级电容器
塔菲尔方程
化学工程
金属有机骨架
电化学
镍
硫化镍
电极
化学
冶金
有机化学
遗传学
生物
工程类
物理化学
吸附
细菌
乳酸
作者
Hasan B. Albargi,Haseebul Hassan,Badriah S. Almutairi,Ehtisham Umar,Muhammad Waqas Iqbal,Afaf Khadr Alqorashi,Hussein Alrobei,Niaz Ahmad,N. A. Ismayilova
标识
DOI:10.1088/1402-4896/ad74a4
摘要
Abstract Electrochemical technologies like supercapacitors and water-splitting electrolysis are gaining traction due to their impressive efficiency in both energy storage and generation. A hydrothermal technique was employed to synthesize a metal-organic framework (MOF) containing zinc and nickel. Glycolic acid (GA), a naturally occurring biodegradable ligand, was utilized to explore its potential for incorporation into the MOF heterostructure. The ZnNi-MOF (GA) composites showed a notable specific capacity of 1648 C/g (2060 F/g) under a current density of 1.0 A/g at 70 oC. The study investigated a supercapacitor system design where a combination of polyaniline-doped activated carbon was used for the negative electrode and a zinc-nickel metal-organic framework (GA) was used for the positive electrode. The synthesized ZnNi-MOF (GA)//AC energy storage device demonstrated a specific capacity of 110 C/g (55 F/g) at a higher current density of 2.0 A/g. The recyclability and stability of device (ZnNi-MOF (GA)//AC) were evaluated using 10000 charge-discharge cycles, yielding an 86 % capacity retention. The ZnNi-MOF (GA) composite displayed outstanding catalytic ability in the hydrogen evolution reaction (HER) in comparison to other tested materials, achieving the lowest Tafel slope of 42.79 mV/dec. The findings of our research suggest that ZnNi-MOF (GA) exhibits desirable characteristics that make it a promising material for electrodes in the applications of supercapattery and HER.
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