Organic functional materials and low-dimensional structural materials as the common auxiliary material compositions are widely used in various components of batteries. This book overviews the latest research on the applications of organic functional materials and low-dimensional structural materials as functional auxiliary materials in batteries. It introduces the properties and preparation methods of these materials, summarizes the application mechanism and conclusions, and puts forward some insights and prospects. It can help new researchers quickly understand the progress of research in related fields and help senior researchers get inspiration for innovation.