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Liquid fuel cells are a kind of electrochemical energy convertor with borohydride aqueous solution or light hydrocarbons as fuel.They are with merits of high efficiency,low environmental impact as well as circumventing the problem of hydrogen storage in H2/O2 fuel cells.The main challenges of the liquid fuel cells are the fuel crossover and sluggish kinetics of oxygen reduction reaction(ORR).Ion exchange membrane(IEM)is a very important component in traditional liquid fuel cells.