▎ 摘　　要

NOVELTY - A grapheme-based composite thin film preparing method involves taking right amount of bacteria as template, manganese ion and sodium ion solution, stirring for 4-14 hours, centrifuging, washing at room temperature to obtain a mixed material. The mixed material is dispersed in 10-20 ml graphene oxide, mixed uniformly, dried after vacuum filtering to form a stripping film. The stripping film is subjected for annealing at 400-800 degrees C for 2-5 hours under inert gas atmosphere to obtain the finished product. USE - Method for preparing grapheme-based composite thin film for use as electrode material (claimed). ADVANTAGE - The method enables preparing grapheme-based composite thin film with increased circulation use life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a grapheme-based composite thin film prepared by the method.