Polyethylene oxide-magnesium phosphate cement composite as a high-performance solid-state electrolyte

In this study, polyethylene oxide (PEO) was incorporated into magnesium phosphate cement (MPC) to explore the methodology and feasibility of utilizing the PEO-MPC composite system as a solid-state electrolyte in structural supercapacitors. The physical, mechanical, and electrochemical properties of the composite, along with its hydration mechanism, were comprehensively analyzed to evaluate its suitability for energy storage applications. The experimental results indicate that the PEO-MPC composite demonstrates exceptionally high ionic conductivity, remarkable mass ratio capacitance, and satisfactory mechanical properties, rendering it a promising candidate for solid-state electrolytes. We developed a PEO-MPC composite solid-state electrolyte system for the first time and achieved simultaneous enhancement of ionic conductivity and compressive strength of MPC composites. These findings highlight the potential of PEO-MPC for utilize as an electrolyte material.