▎ 摘　　要

NOVELTY - Bismuth telluride-based composite cathode material (I) is new. USE - (I) is useful in sodium/potassium ion battery (claimed) for portable electronic device and automobile electric. ADVANTAGE - (I): has the morphology of nanosheets uniformly coated by graphene and carbon layers, thus exhibits high specific capacity, excellent cycle stability and excellent rate when used as cathode material for sodium/potassium ion batteries performance; has simple and easy to operate preparation process, which is suitable for large-scale industrial production, has high capacity, long service life and high power density. DETAILED DESCRIPTION - Bismuth telluride-based composite cathode material of formula (Bi2Te3-rGO-NC) (I) is new. An INDEPENDENT CLAIM is also included for preparation of (I).