CARBON-BASED COMPOSITE FOR OXYGEN REDUCTION CATALYST, METHOD FOR PRODUCING CARBON-BASED COMPOSITE FOR OXYGEN REDUCTION CATALYST, AND USE OF CARBON-BASED COMPOSITE FOR OXYGEN REDUCTION CATALYST

摘要

The present invention addresses the problem of preparing a carbon-based composite for an oxygen reduction catalyst, the carbon-based composite comprising: a nanosheet-like graphene oxide or a reduction product thereof; and carbon quantum dots. The average particle diameter of the carbon quantum dots may be 20 nm or less. The nanosheet-like graphene oxide or the reduction product thereof, and the carbon quantum dots may be complexed in a uniformly mixed state. The carbon quantum dots may contain nitrogen atoms. The weight ratio of the nanosheet-like graphene oxide or the reduction product thereof to the carbon quantum dots may be 90/10 to 10/90 (the former/the latter). The carbon-based composite and a conductive aid may be combined to prepare a composite for a battery cathode catalyst layer. The conductive aid may be Ketjenblack. The carbon-based composite can be prepared simply and inexpensively, does not contain platinum, and can exhibit excellent oxygen reduction electrode characteristics.