凯发

Graphene is a national strategic emerging material. How to obtain high-quality graphene by green preparation method, how to realize the integration and cooperation between graphene and traditional materials and devices, and how to obtain new materials and high-performance devices with multiple functions are the key problems and key topics to be solved in this field. Under the background of increasing energy demand and clean energy development, various energy storage devices came into being. Under the background of the increasing energy demand and the development of clean energy, various energy storage devices have emerged as the times require. Supercapacitors (SCs) are recognized as the most potential energy storage devices due to their advantages such as fast energy conversion, long service life, excellent stability, and low environmental hazards. However, low energy density is the main bottleneck restricting its development and practical application, and high-performance electrode materials are the key to preparing supercapacitors with high energy density. Activated carbon is widely used in supercapacitors due to its low preparation cost, large specific surface area, a wide range of sources, stable electrochemical performance, and environmental friendliness. Unfortunately, traditional activated carbon supercapacitors' low specific capacity (80~120 F·g-1) and low energy density (~8 Wh·kg-1) greatly hinder their more comprehensive application. In this report， expounds the research results of the reporter in the green and efficient preparation methods of graphene and its extended application in recent years. In particular, commercial activated carbon and graphene with excellent conductivity were compounded to prepare an integrated electrode material with three-dimensional conductive structure, no binder and no conductive agent. By studying the relationship between the structure and electrochemical performance of the electrode material, a supercapacitor with high energy density and excellent cycle performance was constructed.