Green composite papers via use of natural binders and graphene for PEM fuel cell electrodes
Ghobadi, Sajjad and Işıkel Şanlı, Lale and Bakhtiari, Rokhsareh and Alkan Gürsel, Selmiye (2017) Green composite papers via use of natural binders and graphene for PEM fuel cell electrodes. ACS Sustainable Chemistry and Engineering, 5 (9). pp. 8407-8415. ISSN 2168-0485
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Official URL: http://dx.doi.org/10.1021/acssuschemeng.7b02207
Herein a new fabrication method was suggested via paper molding process for preparation of gra-phene/cellulose/carbon fiber composite paper to be used as the flexible electrode layers mainly for PEM fuel cell. As a green and eco-friendly process, composite papers were prepared at ease with no pollutant by product formation by using ionic liquids (IL). At first carbon fibers bound via cellulose fiber to form cellulose/carbon fiber composite paper by wet-laying. Then, electrical conductivity as well as hydrophobicity of the composite papers were improved by extraction of cellulose via ionic liquid-assisted phase inversion method and then gra-phene inserted to the structure of ionic liquid treated composite paper by spray coating. Moreover, by spray coating of 0.5 mg cm-2 platinum (Pt) catalyst to the mentioned composite papers, significant improvement in their fuel cell performances were achieved at low relative humidity (RH) fuel cell operation conditions (RH <50%) what increases the overall system efficiency. The highest power density was recorded at 50% RH as 911 mW cm-2 which was over 20% higher than the 100% RH operating conditions.
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