Ali Murat SOYDAN, Mert AKEL, Recep AKDENİZ

Nano Bor İçerikli Yeni Nesil PEMFC Nanokompozit Membranların Üretimi ve Karakterizasyonu

Bu çalışmada, çeşitli stokiyometrik oranlarda hazırlanan nano hekzagonal bor nitrür (NhBN), fosforik asit (FA) ve Nafyon (NAF) içeren yeni nesil proton iletken nano kompozit membran (NKM) üretildi ve su tutma, metanol geçirgenlik ve iyonik iletkenlik değerleri incelendi. NAF ağırlıkça %3-10 oranlarında NhBN ve molce %10-20 oranlarında FA ile karıştırılarak NKM’lar hazırlandı. Metanol geçirgenliği ve su tutma testleri sonuçlarına göre, hidrofobik NhBN parçacıklarının membranların su tutma ve metanol geçirgenliğini azaltırken FA’in su tutma özelliği ve metanol geçirgenliğini arttırdığı gözlemlendi. Maksimum proton iletkenliği, nem içermeyen ortamda 150°C'de, molce %20 FA ve ağırlıkça %3 NhBN içeren NKM için 0.056 S/cm olarak ölçüldü.

Anahtar Kelimeler:

Nafyon, nano kompozit membran, nano bor katkısı, PEMFC

Production and Characterization of Novel PEMFC Nanocomposite Membranes Including Boron Nanoparticles

In this study, water absorption, methanol permeation and proton conductivity values of nano composite proton conducting membrane based on nafion, phosphoric acid and hexagonal boron nitride with various stochiometric ratios are investigated and membrane characterizations are made throughout this study. Ternary composite membranes are prepared by mixing Nafion with nano hexagonal boron nitride (NhBN) particles varied 3, 5 and 10% weight ratios and phosphoric acid varied 10 and 20% molar ratios respectively. According to the results of methanol permeability and water absorption investigations, it has been observed that hydrophobic NhBN particles increase the water absorption and methanol permeability of the membranes while phosphoric acid enhances these properties. Under anhydrous conditions at 150°C, higher ionic conductivity values are obtained than pure Nafion such as 0.056 S/cm for membranes that contain %20 phosphoric acid molarly and %3 BN weight ratios.

Keywords:

Nafion, nano composite membrane, nano boron additive, PEMFC,

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