化学气相沉积石墨烯基准固态超薄柔性钠离子超级电容器

IF 2.9 Q2 ELECTROCHEMISTRY Journal of Electrochemical Science and Engineering Pub Date : 2022-09-09 DOI:10.5599/jese.1411

Mohammed Saquib Khan, Preeti Shakya, N. Bhardwaj, Deependra Jhankal, A. Sharma, M. K. Banerjee, K. Sachdev

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引用次数: 1

摘要

柔性电子器件在可穿戴电子产品和可折叠电子产品中有着广泛的应用。本文报道了一种用于固态柔性超级电容器器件的化学气相沉积(CVD)多层石墨烯。拉曼光谱分析显示石墨烯样品中多达五层。聚乙烯醇- na2so4水凝胶膜作为凝胶聚合物电解质(GPE)。50 nm厚的银(Ag)通过电子束沉积在聚对苯二甲酸乙二醇酯(PET)上，作为器件的柔性集流器。通过恒流充放电(GCD)对制备的器件进行电化学性能分析，在0.05 mA cm-2电流密度下，其比面电容为15.3 mF cm-2。当功率密度为25 μ W cm-2时，器件的功率密度为0.53µWh cm-2。

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Chemical vapor deposited graphene-based quasi-solid-state ultrathin and flexible sodium-ion supercapacitor

Flexible electronic devices find wide application in wearable electronics and foldable gadgets. This article reports chemical vapor deposited (CVD) few-layers graphene for a solid-state flexible supercapacitor device. Raman spectroscopy analysis reveals up to five layers in the graphene samples. Polyvinyl alcohol-Na2SO4 hydrogel membrane is used as a gel polymer electrolyte (GPE). 50 nm thick silver (Ag) deposited on polyethylene terephthalate (PET) through E-beam deposition served as the flexible current collector for the device. Galvanostatic charge-discharge (GCD) executed on the fabricated device to analyze its electrochemical performance yielded a specific areal capacitance of 15.3 mF cm-2 at 0.05 mA cm-2 current density. The obtained power density of the fabricated device is 0.53 µWh cm-2 at a power density of 25 µW cm-2.

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