Mn-Cu alloy based flexible electrode for supercapacitor applications

Significant advancements have been made in the application of technologies utilizing flexible screens and sensors. However, progress in the field of flexible energy storage devices has been quite limited. Research on flexible energy storage electrodes is essential due to the critical role of flexibility and stretchability in wearable, biomedical, and portable electronic devices. This study investigates the electrochemical properties of flexible Mn-Cu alloy-coated films, filaments, and fabric graphite samples for supercapacitors. The electrochemical synthesis of Mn-Cu-based hybrid graphite is conducted using a deep eutectic solvent ionic liquid at various static voltages. Following the electrochemical deposition performance in Ethaline deep eutectic solvent, electrodes obtained are evaluated for electrochemical properties at various scan rates in different electrolytes. These electrolytes include sodium sulfate (Na2SO4), potassium hydroxide (KOH), a mixture of sodium sulfate and potassium hydroxide (Na2SO4 + KOH), and hydrochloric acid (HCl). The performance of the electrodes is examined through chronocoulometry, chronoamperometry, and cyclic voltammetry (CV) studies. Subsequently, non-electrochemical methods such as X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) are employed for the characterization of these hybrid electrodes. The research aims to enhance the capacitance, energy, and power performance of supercapacitors. To achieve this goal, electrochemical processes were thoroughly examined to enhance the electrochemical properties of the electrodes. The obtained data indicate that Mn-Cu alloy-based stretchable graphite electrodes offer high specific capacitance values. These examination results are promising for use in supercapacitor technology applications.