Abstract:
Recently, flexible and wearable microelectronics has become one of the most exciting
and trending fields of research. Various types of flexible and wearable devices have
been introduced lately. In this work, we have demonstrated an easy and facile approach
to fabricate all solid state asymmetric flexible micro-supercapacitor (MSCs) by using
CO2 laser scribing technique and electrodeposition. Ternary metal oxide (nickel cobalt
oxide) was electrodeposited through electrodeposition at a particular value of I×t
(current passed during deposition × time of deposition) and was used as electrode.
PVA-H3PO4 is the gel electrolyte used for all the electrochemical measurements.
Asymmetric nature of our fabricated device helped to widen the operating voltage range
up to 1.4 V. The areal capacitance for the fabricated device was 2.02 mF cm-2 at 0.25
mA cm-2 current density. The fabricated micro-supercapacitor all solid state device also
shows high flexibility (over 90% capacitance retention) at 120o bending.
