Battery type hybrid supercapacitor based on conducting polymers ; Hibridni superkondenzatori akumulatorskog tipa na bazi provodnih polimera

The electrochemically synthesized polypyrrole and lead-lead sulfate are examined as a potential electrodes for battery-type hybrid supercapacitors in acidic solution. Discharge in the specific current range of ∼0.6–2.27 A g−1 based on the active masses, can deliver capacity of 90–72 Ah kg−1, energy of 58–40 Wh kg−1 and power of 40–1350 W kg−1, with the specific capacitance of the cell in the range of 300–250 F g−1. The device exhibits battery-type behavior at low discharge rate, e.g. <0.5 A g−1, and supercapacitors-type behavior at a higher discharge rate. It is estimated that cell will lose 20% of initial capacitance after ∼500-600 cycles. The electrochemically synthesized polyaniline and lead sulfate are investigated as a possible active material of the aqueous based hybrid asymmetric supercapacitors. The electrochemical characteristics of polyaniline (doping-dedoping reactions), as well as electrical characteristics (specific capacitance, capacity, energy, and power) of the PbSO4|PANI cell, are determined. The cell capacitance, ranging from 216 F g−1 to 230 F g−1 is determined. In the specific current range of 0.3–1.5 A g−1 based on the active masses, the specific energy decrease from 30 to 20 Wh kg−1, while specific power increased from 200 to ∼800 W kg−1. The specific capacity of the cell, slightly decreased from 47 Ah g−1 to 40 Ah g−1 by increasing the specific current. It is estimated that cell will lose 20% of initial capacitance after ∼550 cycles. Based on the estimated specific energy and power, it is suggested that investigated cells could be classified as hydride asymmetric battery type supercapacitors оr “supercapattery” type of electrochemical power sources. ; Elektrohemijski sintetizovani polipirol i olovo-olovo sulfat ispitani su kao potencijalne elektrode za hibridne superkondenzatore akumulatora tipa u kiselom rastvoru. Pražnjenjem u strujnom opsegu od ~0,6-2,27 A g-1 na bazi aktivnih masa, određene su vrednosti specifični kapaciteti od 90-72 Ah kg-1, energija od 58-40 Wh kg-1 i snaga od ...