The Power of Gelatin: Nature–Inspired Materials for Next–Generation Electrochemical Energy Storage Systems

Abstract Non−active components, including binders and electrolytes, play equally critical roles alongside active materials in constructing stable electrochemical reaction environments in high−energy−density electrochemical energy storage (EES) systems. Particularly for practical applications, non−active components must not only exhibit multifunctionality but also demonstrate cost−effectiveness and ease of processing. Gelatin, a naturally derived biopolymer with diverse compositional and structural characteristics, presents significant potential to fulfill these stringent requirements. Most notably, gelatin can establish tunable interactions with nanoparticles and ions, thereby offering substantial opportunities for enhancing EES system performance. However, the inherent complexity of gelatin's composition and structure presents considerable challenges in elucidating its underlying mechanisms, consequently limiting the full realization of its potential. In this perspective, the roles and mechanisms of gelatin are systematically analyzed in energy storage systems by examining the diverse interactions it facilitates, summarizing its influence as a non−active component on electrochemical behavior, and identifying promising future research directions. Critical insights are provided for designing advanced non−active materials by synergistically integrating gelatin's dynamic flexibility with cutting−edge innovations to enable next−generation EES systems featuring superior cycling stability and enhanced energy density.