All‐Organic Batteries

All-organic batteries have been an extensive subject of research since the 1960s and have recently gained significant momentum, making them one of the most promising battery systems. Among various all-organic batteries, proton batteries have witnessed the fastest development due to the fast dynamics of protons. Additionally, all-organic batteries utilizing metal ions as charge carriers have also gained appreciation from researchers. The rapidly developing all-organic redox flow battery (ORFB) in recent years has been recognized as a potential candidate for large-scale energy storage. Therefore, designing and developing organics through molecular engineering to obtain high-potential small molecules or polymers that can be used in all-organic batteries has become a hot research topic. Concurrently, the design and optimization of the electrolyte also go hand in hand. In contrast, certain parts of the all-organic battery utilize an aqueous electrolyte system, exhibiting excellent economic efficiency and potential applications. This chapter provides an outline of the development of all-organic batteries, focusing on the materials, electrolyte design, and other systems of all-organic batteries in recent years. It concludes with a summary of the design concepts and future directions for all-organic batteries.