Modified physico-chemical properties and supercapacitive performance via DMSO inducement to PEDOT: PSS active layer

作者：Lee Seung Hwan; Sohn Ji Soo; Kulkarni Sachin B; Patil Umakant M; Jun Seong Chan^*; Kim Jung Hyun

来源：Organic Electronics, 2014, 15(12): 3423-3430.

DOI：10.1016/j.orgel.2014.09.020

• Physico-chemical and supercapacitive properties
• PEDOT:PSS
• DMSO
• Conductivity
• Roughness
• Supercapacitor

Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) was treated with dimethyl sulfoxide (DMSO) in order to modify it physico-chemical properties in an effort to improve its electrochemical performance. In this study, the conductivity of PEDOT: PSS was controlled through post-solvent treatment in DMSO for various dipping times. The maximum conductivity of the DMSO-treated PEDOT: PSS electrode was similar to 1890 S cm(-1). The electrical conductivity, PEDOT to PSS ratio, chemical compositions, wettability, and surface roughness are correlated and suitably explained. The supercapacitive performance of the DMSO-treated PEDOT: PSS electrodes was studied in 1 M H2SO4 within an optimized potential window of 0 to -0.6 V versus Ag/AgCl. The maximum specific capacitance of the PEDOT: PSS electrode treated in DMSO for 60 min was found to be similar to 153 Fg(-1) at a 1mA cm(-2) discharge current density (similar to 145 Fg(-1) at a 10 mV s(-1) scan rate), along with an energy density of 93Wh kg(-1) and a power density of 4.6 kW kg(-1).

• 出版日期2014-12