Field emission stability and life time of CNT cathode is closely related with the vacuum level, thermal effects during the emission and the current transport capability.

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

Depending on the choice of material for the anode, cathode, and electrolyte the voltage, capacity, life, and safety of a lithium ion battery can change dramatically.