<p>Recently, supercapacitors have drawn much attention from scientists and researchers worldwide, it would be ideal to have electrode materials with improved charge storage capacity. In this article, we describe the sonochemical synthesis of mixed transition metal phosphates nanomaterials, which were then enhanced utilizing radiations of 5.0&#xa0;MeV carbon ions (C²⁺). The C²⁺ implanted encouraged several developments within the targeted electrodes were analyzed using a simulation package called Stopping and Ranges of Ions in Matters (SRIM). We employed different systems in examining the crystal characteristics, surface geomorphologies, elemental analysis, and optical nature of the pristine and optimized electrodes. The assessed specific capacitance of 1350 Fg⁻¹ using cyclic voltammetry (CV) using scan speed of 1.0 mVs⁻¹ and 1554 Fg⁻¹ from galvanostatic charge/discharge (GCD) at 0.5 Ag⁻¹ current density, respectively, were obtained from the best-performed electrode. Various results acquired in work signify that the invented electrode materials could be improved using C²⁺irradiation using dosage of 5.0 × 10¹⁵ ionscm⁻². This innovative development by a&#xa0;combination of ternary metal phosphates and graphene oxide (GO) with an enhancement using C²⁺ implantation produces an electrode material that is appropriate for higher-performance supercapacitor usages and confirms that a moderate dose (fluence) of ion implantation is a useful technique for enhancing supercapacitor electrodes.</p>