Fabrication of anion-exchange composite membranes for alkaline direct methanol fuel cells
2011; Elsevier BV; Volume: 199; Linguagem: Inglês
10.1016/j.jpowsour.2011.10.020
ISSN1873-2755
AutoresChun‐Chen Yang, Sheng-Shin Chiu, Shih-Chen Kuo, Tzong‐Horng Liou,
Tópico(s)Advanced battery technologies research
ResumoThe quaternized poly(vinyl alcohol)/3-(trimethyl ammonium) propyl-functionalized silica (designated as QPVA/Q-SiO2) composite polymer membrane is prepared by a solution casting method. The Q-PVA is polyvinyl alcohol (PVA) derivatized with glycidytrimethyl ammonium chloride (GTMAC) and the Q-SiO2 is 3-(trimethyl ammonium) propyl-functionalized silica. The highest ionic conductivity of the QPVA/20 wt.%Q-SiO2 composite polymer electrolyte is σ = 2.37 mS cm−1 at ambient temperature. The alkaline direct methanol fuel cell (ADMFC) comprised of an anion-exchange QPVA/Q-SiO2 composite membrane is assembled and examined. The highest peak power density of the DMFC with 8 M KOH + 2 M CH3OH fuel is 35.13 mW cm−2 at 50 °C and 1 atm air. The peak power density is 0.27 mW cm−2 with a pure 2 M CH3OH fuel at 25 °C and 1 atm air.
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