Exploration of the electrochemical performance of mesoporous In2O3 nanoparticle using gC3N4 QDs as an electrolyte additive to the KOH alkaline electrolyte

In this study, graphitic carbon nitride quantum dots (CNQDS) were employed as an electrolyte additive to the alkaline solution. CNQDs possess a large surface area and accessible edges that function as active sites for electrochemical reactions, which would boost the electrochemical performance. Here, we have also prepared mesoporous In 2 O 3 nanoparticles through a facile hydrothermal method. Its electrochemical performance was investigated using In 2 O 3 as an active electrode and CNQDs as an electrolyte additive to an alkaline electrolyte in two different ratios [KOH-CN2 and KOH-CN4]. The highest ratio of CNQDs with the In 2 O 3 active electrode exhibits the highest specific capacity of 1025.56C/g at a scan rate of 10 mV/s. Moreover, the asymmetric device M-In 2 O 3 /KOH-CN4/AC was fabricated, and its electrochemical behavior were analyzed using KOH-CN4 as an electrolyte additive. The device exhibits an elevated specific capacity of 285.61 at 1 A/g with cyclic retention of 94.5% after 7000 cycles. Therefore, the CNQDs additive plays a major role in enhancing the electrochemical performance and has a potential application in supercapacitors.