The lithium-air battery has been regarded as one of the most promising power source technologies due to its extremely high theoretical energy density .However,the large overpotentials during the discharge and charge processes resulted from the sluggish oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)at cathode,lead to poor round-trip efficiency and lifetime of lithium-air battery.Therefore,to realize its large-scale commercialization,it is critical to develop effective bifunctional cathode electrocatalysts to expedite the ORR and OER .To date,the high cost of precious metal catalysts and the limited catalytic activities of non-precious metal catalysts make them not truly available for the practicability of the lithium-air battery.It is reported that the metal organic frameworks (MOFs)have the promising applications in gas storage and separation due to their high specific surface areas and tunable pore structures .Specially,the functional groups and the metal ions as catalytic activity sites can be designed corresponding to the types of reactions,which provide the possibilities for their catalysis applications,especially electrocatalysis.
展开▼
