▎ 摘 要
NOVELTY - A multiple graphene layer is prepared by mixing charcoal powder and strong alkali, microwave heating for 5-50 minutes, washing with water and acid, removing inorganic impurity, and purifying. USE - Method for preparing multiple graphene layer used for lithium ion battery cathode material, adsorption material and catalyst carrier (claimed). ADVANTAGE - The method has easy to obtain raw material and simple technique. The graphene layer has excellent property.