Study Of The Preparation Technology And Performance Of Biploar Lead-lithium Battery

Lead-acid battery has the irreplaceable status in the field of chemical power source for a long time. However, the lower specific capacity and short service life of traditional lead-acid batteries as a power battery limit the use of lead-acid batteries.With the spring up of green energy technology, the applications of lead-free and less lead batteries are raised in recent years.In order to develop a new bipolar leadlithium battery with high specific capacity and long service life, we have studied the preparation process of the composite titanium substrate and aluminum substrate. Also, prepared lead-lithium battery and its performance testswere carried out.First of all, composed polyaniline coating on the surface of titanium platewith the constant current method. Except the good electrical conductivity, the polyaniline film can make water decomposition penitential moved positively, thus inhibited the hydrogen evolution reactionin the charge and discharge process. At the same time, the existence of the polyaniline film can also avoid the formation oftitanium dioxide and other titanium composite oxides, make the titanium substrate remains stable in a high electrode potential and strong oxidizing conditions, and thus ensure the battery has good electrochemical performance and stability.Generated lead plating layer on the surface of aluminum plant with electroplating methodcan effectively prevent the aluminum substrate corrosion in the cell cycle. Also, the lead plating layer and the active material shows good adhesion, in order to avoid the loss of active substances in the electrochemical reaction, and ensure the stable performance of the battery.Assembled single lead-lithium battery and tested its performance, we have found: charging and discharging monomer battery in low-current(200 m A/g), the discharge specific capacity of positive active material(Li Mn2O4) is 98 m Ah/g; charging and discharging monomer battery in high-current(300 m A/g), the discharge specific capacity of positive active material(Li Mn2O4) is 64 m Ah/g. Charging and discharging the bipolar battery based on Ti in 200 m A/g, the discharge specific capacity of Li Mn2O4 is 113 m Ah/g; in 300 m A/g, the discharge specific capacity of Li Mn2O4 is 95 m Ah/g. Charging and discharging the bipolar battery based on Al in 200 m A/g, the discharge specific capacity of Li Mn2O4 is 100-105 m Ah/g; in 300 m A/g, the discharge specific capacity of Li Mn2O4 is 75-110 m Ah/g and shows poorer stability, which is still higher than single batteries.In addition, the neutrallead-lithium battery has low self-discharge rate. Charging and discharging in 200 m A/g after shelving 6 days, the battery can still maintain the discharge voltage of 1.240 V, which indicates that the neutrallead-lithium batteryhas a good storage performance.In general, the bipolar lead-lithium battery shows more excellent performance than monomer lead-lithium battery, which can be the future development trend of a new typelead-less batteries.