Method of preparing catalyst and catalyst composite from waste lithium batteries

A method of producing catalyst from waste lithium batteries includes the steps of: (a) recycling anode powder from the waste lithium batteries; (b) dissolving the metal contained in the anode powder with an acid solution and filtering out the impurities to obtain a metal solution; (c) slowly adding an alkali solution into the metal solution to generate a precipitate via precipitation; (d) adding an oxidant into the metal solution to make the precipitate performing oxidation reaction; (e) taking out the precipitate after oxidation and performing processes of washing, drying and calcination on it to obtain the catalyst. This invention further provides a method of preparing a catalyst composite from waste lithium batteries. The method of this invention recycles waste lithium batteries and further prepares catalysts or catalyst composites from the waste lithium batteries, which not only reduces the amount of waste batteries and diminishes potential environmental pollutions, but increases the values and benefits o