Cost-Effective Fabrication Process in 24 Hours for Supercapacitors

In the ever-expanding realm of modern science and electronics, the demand for miniaturized and flexible energy storage devices is growing to enhance people’s lives with compact and adaptable electronics. Currently, the prevalent use of micro-batteries in potable devices presents a significant drawback, marked by their short life spans of only a few hundred to several thousand cycles, thus frequent replacement is required but becomes problematic in the context of implantable biochips. Not only this, connecting micro-batteries by some combination to provide high power makes it even bulkier. In stark contrast, micro-supercapacitors with an increase in a number of advantages like flexibility, remain lightweight with high power discharge. Apart from this manufacturing cost-effective micro-supercapacitors in less time is a task. Thus, this work addresses the making of micro-supercapacitors from highly porous pseudocapacitive material MOFs (metal organic framework) using LASER ablation technique. The substrate used here is a normal paper where deposition of material is exhibited using a very simple method and finally scribing it using CO₂ LASER scribing. Different designs of MSCs are also explored and finalized in-plane concentric shape which provides a wide voltage window from 0 to -0.8 V as well as from 0 to 0.8 V at high scan rates showing the highest areal capacitance of 57 μF cm^-2. Moreover, making use of gel electrolyte and showing capacitance in microns increases its feasibility for flexible devices. Finally, to show the practical application of the electrode several LEDs were blinked by stacking prepared MSC. Thus, the cost-effective method is implemented with a claim of manufacturing micro-supercapacitors in a single day.