Design Concepts of High-Entropy Materials for Zinc Ion Batteries.

Abstract

Zinc-ion batteries have emerged as strong candidates for replacing Li/Na-ion batteries owing to their high safety and environmental friendliness. However, the large electrostatic repulsion between the cathode and Zn²⁺, the irreversible growth of zinc dendrites at the anode, and the hydrogen precipitation side reaction in the aqueous electrolyte have hindered the practical application of zinc ion batteries. Fortunately, the emergence of the revolutionary concept of high entropy has provided new opportunities for the development of battery materials. High-entropy materials, with their unique atomic structures and uniform distribution of multiple elements, offer flexible options for material compositions and electronic structures, thus attracting significant attention in battery systems. In this concept article, we summarize the definitions and intrinsic structural characteristics of high-entropy materials and provide a detailed overview of the latest design concepts from the perspectives of cathodes, anodes, and electrolytes. Finally, we outline the challenges faced by high-entropy materials and potential solutions to guide researchers in developing efficient and stable zinc-ion batteries.