Conductivity and electrochemical studies on polymer electrolytes based on poly vinyl (chloride) - ammonium triflate-ionic liquid for proton battery

• Published in: International Journal of Electrochemical Science
• Main Author: Deraman S.K.; Mohamed N.S.; Subban R.H.Y.
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84873878243&partnerID=40&md5=9b77b81805d51218c429ac10c76fd071

Solid polymer electrolyte films of poly (vinyl) chloride (PVC) with ammonium trifluoromethane sulfonate (NH4CF3SO3) and ionic liquid, butyltrimethyl ammonium bis (trifluoromethyl sulfonyl) imide (BATS) as plasticizer have been prepared by solution-cast technique. The films were characterized electrically by Impedance Spectroscopy for its ionic conductivity. The highest ionic conductivity achieved at room temperature was for 85 wt. % (PVC -NH4CF3SO3) + 15 wt. % BATS with ionic conductivity of 1.56 x 10 -4 Scm-1. Ionic transference number of the mobile ions estimated by dc polarization method and the H+ ionic transference number was found to be ̃ 0.82 which revealed that the conducting species are predominantly ions. Linear sweep voltammetry results revealed that the film is electrochemically stable up to 1.1 V. An electrochemical cell fabricated using configuration of: Zn+ZnSO4.7H2O +PTFE (anode) | 85 wt. % (PVC -NH4CF3SO3) + 15 wt. %BATS | MnO2+PTFE (cathode) produced a maximum open circuit voltage of ̃ 1.52 V while its discharge characteristics demonstrated a capacity of 6.0 mAh using 1.5 k Ω load resistance. © 2013 by ESG.