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Supercapacitors are known as energy storage devices that can deliver quick bursts of energy and high power density compared to batteries and conventional capacitors. Hybrid CP/LDHs for supercapacitors refer to a combination of Carbon paper and Ternary Layered Double Hydroxides (LDHs) used as materials in the construction of supercapacitor electrodes. Research and development in this area focus on optimizing the composition and structure of these materials to achieve higher energy densities, faster charge/discharge rates, and longer cycle lifetimes for supercapacitors used in various applications such as energy storage systems, portable electronics, and hybrid vehicles. They can significantly enhance the device's performance by providing increased capacitance, improved charge storage capacity, and better cycling stability. Additionally, these electrodes can offer more advantages such as low cost, environmental friendliness, and ease of synthesis.

This present work reports the development of free-standing CP/Ni-Fe-V (LDHs) electrodes. Which are synthesized on the CP substrate by a simple hydrothermal technique (140°C/12h). We investigate how element proportions affects the electrochemical properties of the electrode.  The synthetized materials are characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and contact angel. The electrochemical performance of a CP/Ni-Fe-V electrode are evaluated with cyclic voltammetry (CV), charge-discharge (CDG) and electrochemical impedance spectroscopy (EIS), using a three electrode cell and a two electrode device, with Ag/AgCl as reference in a neutral electrolyte 1M Na₂SO₄.

Our results reveal the exceptional potential of the CP/ternary LDHs hybrid composition, showcasing superior electrochemical performance with a higher specific capacitance at a scan rate of 20 mV/s, in a three-electrode cell. This cost-effective method provides excellent specific supercapacitor characteristics and promising advancements in energy storage technology.