Microwave assisted Gd(OH)3–MXene nanocomposites for high power density solid state supercapacitor applications

Abstract

A gadolinium hydroxide–MXene nanocomposite was synthesized through a microwave-assisted route as a supercapacitor electrode material. The prepared electrode material demonstrated a specific capacity of 128 mAh g⁻¹, along with 98% capacitance retention after 5000 cycles. An solid-state hybrid supercapacitor (Gd–MX//AC) delivered an energy density of 25.8 Wh kg⁻¹ and a high power density of 3000 W kg⁻¹, while maintaining outstanding capacitance retention over repeated cycles.