Electrochemical characteristics of supercapacitor electrode materials with modified CNTs fabricated by emulsion templating
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초록
내용
A poly(divinylbenzene)-based carbon foam having a high specific surface area was prepared by a high internal phase emulsion (HIPE) templating method, and its electrochemical characteristics as a supercapacitor electrode material were investigated. To enhance the role as a pseudo-capacitor with excellent specific capacitance, a ternary composite prepared by synthesizing either TiO2 or Ag on polyaniline-coated CNTs was used as a nanofiller. By carbonizing the HIPE foam activated with KOH, hierarchically porous carbons (HPCs) composed of micropores and mesopores were obtained, which were advantageous in improving specific capacitance. Supercapacitor electrodes were manufactured using the obtained HPCs, and electrochemical properties were evaluated through cyclic voltammetry and galvanostatic charge-discharge test.