Enhancement of Hybrid SPEEK Based Polymer–Cyclodextrin-Silica Inorganic Membrane for Direct Methanol Fuel Cell Application

Abstract

Direct methanol fuel cell (DMFC) is one of several types of fuel cells that use proton exchange membrane (PEM) as a liaison between the reaction at the cathode and anode. Polyether-ether ketone (PEEK) is one of the aromatic polymer that can be applied in DMFC because of its characteristics that are resistant to DMFC environment. The polymer is also quite easy in the sulfonation process using concentrated sulfuric acid. However the role of polyether-ether ketone as DMFC membrane material is still lack of advantage due to its low conductivity and therefore the modification is required to increase the value of proton conductivity of the membrane. The purpose of this experiment is to modify the membrane (sPEEK) with the addition of cyclodextrins-silica, additive variation charge of 2%, 6% and 10%, time and temperature were fixed at 4 hours and 65 o C. The results showed the best results of membrane sPEEK was obtained at the addition of polymer-cyclodextrin-silica 10% with the membrane characteristics of ion exchange capacity of 2.19 meq/g polymer, the degree of sulfonation of 81%, methanol permeability of 3.09 x 10 -9 cm 2 / s and water uptake membrane of 64%.

Pengaruh Metode Sulfonasi dan Penambahan Pengisi pada Membran Direct Metanol Fuel Cell

“…Kelemahan utama dari membran nafion adalah harganya yang terlalu tinggi sehingga menghambat komersialisasi dan penerapan di segala bidang yang membutuhkan pengembangan energi baru terbarukan khususnya fuel cell (Wang et al, 2018). Polieter-eter ketone adalah material membran yang dikembangkan untuk menggantikan nafion pada DMFC, sifat mekanik dan kimia yang dimiliki PEEK sesuai dengan karakteristik membran pada DMFC, namun pada pengembangannya membran PEEK masih memiliki kekurangan yaitu, terjadinya methanol crossover dan nilai konduktifitas proton yang rendah (Kusworo, Hakim, & Hadiyanto, 2017).…”