Abstract: Gelatin, a macromolecular biopolymer derived through controlled hydrolysis of collagen from animal connective tissues, exhibits thermoreversible sol-gel properties. Leveraging this unique characteristic combined with metal ions naturally present in fruit juices, we developed gelatin-based jelly electrolyte materials and constructed a series of accessible electrochemical demonstration devices. Our science communication approach integrates engaging educational demonstrations with hands-on experiments, enabling the public to gain deeper insights into the fundamental principles of fruit-based batteries, the ion transport mechanisms within constrained gelatin matrices, and the operational fundamentals of conventional battery systems. This initiative effectively showcases the superior performance of gel electrolytes in energy storage applications while enhancing public understanding of natural macromolecules and electrochemical science. The experimental design employs low-cost, readily available materials with complete environmental compatibility and operational safety, successfully achieving its goal of innovative science education through familiar everyday substances.

Key words: Gelatin, Sol-gel transition, Aqueous batteries, Gel electrolyte, Flexible batteries