Cathode surface, led to the decrease of the internal resistance increases, activity, make Germany sunshine greatly shorten the service life of battery.

Some other methods for improving catalyst activity such as cathode catalyze, alloy catalyst are also reviewed in the paper. Finally, some reasonable advises are given based on these progresses.

One is low methanol oxidation activity at the anode, and the other is methanol crossover from the anode to the cathode through the membrane.