Due to the energy crisis in the world,fuel cells are attractive as clean and sustainable energy conversion devices1.For the goal of practical industrial development of fuel cells,cheap,sustainable and high performance (high activity,stability and tolerance to poisons) electrocatalysts for oxygen reduction reactions (ORR) which rival those based on platinum (Pt) and other rare materials are highly desirable for use in fuel cells1-6.Here we show that a class of cheap and high-performance metal-free oxygen reduction electrocatalysts obtained by co-doping cheap carbon blacks with non-metal atoms.The obtained metal-free electrocatalysts are highly active and exhibit longterm operation stability and tolerance to poisons during oxygen reduction process in alkaline medium.The alkaline direct methanol fuel cell with the best one as cathode outperforms the one with Pt-based cathode.To the best of our knowledge,these are the most efficient non-Pt based electrocatalysts which are the most promising alternatives to those that are Pt-based.Since carbon blacks are 10,000 times cheaper than Pt,these electrocatalysts possess the best price/performance ratio for ORR to date.