PbC capacitor battery

Axion has revealed test data showing that PbC batteries have withstood 1600 cycles before failure. The test protocol calls for a complete charge-discharge cycle every 7 h to a 90% DOD. In comparison, most lead-acid batteries designed for deep-discharge applications can only survive 300 to 500 cycles under these operating conditions. 

Axion has stated that the PbC battery has several key performance advantages over conventional lead-acid batteries  

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Axion Power International Inc. has developed a PbC capacitor battery, as shown in Figure 1.34. The full technical description of Axion s proprietary PbC technology is a multi-celled asymmetrically supercapacitive lead-acid-carbon hybrid battery. Like a lead-acid battery, the PbC battery consists of a series of cells. Within the individual cells, however, the construction is more complex. Whereas the negative electrodes in lead-acid batteries are simple sponge lead plates, the negative electrodes in a PbC battery are five-layer assemblies that consist of a carbon electrode, a corrosion barrier, a current collector, a second corrosion barrier, and a second carbon electrode. These electrode assemblies are then sandwiched together with conventional separators and positive electrodes to make the PbC battery, which is filled with an acid electrolyte, sealed and connected in series to the other cells [11]. 

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