تهیه غشاهای پلی آریلن اتری سولفونه تقویت‌شده با گرافن اکساید سولفونه جهت استفاده به‌عنوان غشای تبادل پروتونی در پیل‌های سوختی پلیمری

نوع مقاله : مقاله پژوهشی

نویسندگان

پژوهشکده علوم پلیمر، پژوهشگاه پلیمر و پتروشیمی ایران، تهران، ایران

چکیده

مقدمه و اهداف: در این پژوهش، با هدف ارتقای عملکرد غشاهای پلیمری مورد استفاده در پیل‌های سوختی، غشاهای نانوکامپوزیتی بر پایه پلی‌آریلن اتر سولفونه (sPAE) طراحی و بررسی شدند. تمرکز اصلی بر استفاده از نانوصفحات گرافن اکساید سولفونه (sGO) به‌عنوان فاز تقویت‌کننده بود.
مواد و روش‌ها: برای تهیه غشاها، نانوصفحات sGO در سه درصد وزنی ۲، ۴ و ۶ به ماتریس پلیمری sPAE افزوده شدند. نمونه‌های تولیدشده تحت آزمون‌های فیزیکوشیمیایی و الکتروشیمیایی شامل ظرفیت تبادل یونی، جذب آب، پایداری حرارتی، هدایت پروتونی و عملکرد تک‌سل پیل سوختی ارزیابی شدند.
یافته‌ها: نتایج نشان داد غشای نانوکامپوزیتی حاوی ۲ درصد وزنی sGO بهینه‌ترین ترکیب است. این غشا، ظرفیت تبادل یونی meq/g 1/98‎، جذب آب 31/8 % و هدایت پروتونی S/cm‎ 0/268 در دمای ‎°C ‎80 را نشان داد. علاوه‌براین، در آزمون عملکردی تک‌سل، افزایش ‎‎15 % در چگالی جریان و ‎30 % در چگالی توان نسبت به غشای مرجع مشاهده شد.
نتیجه‌گیری: بر اساس نتایج، افزودن ۲ درصد وزنی نانوصفحات sGO به غشاهای sPAE منجر به بهبود قابل‌توجه ویژگی‌های فیزیکی و الکتروشیمیایی شد. این غشاها گزینه‌ای کارآمد برای استفاده در شرایط عملیاتی پیل‌های سوختی محسوب می‌شوند. 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Preparation of Sulfonated Polyarylene Ether Membranes Reinforced with Sulfonated Graphene Oxide as Proton Exchange Membranes in Polymer Electrolyte Fuel Cells

نویسندگان [English]

  • Maryam Oroujzadeh
  • Maryam Jalili Marand
Polymer Science Research Institute, Iran Polymer and Petrochemical Institute, Tehran, Iran
چکیده [English]

Introduction and Objectives: This study aimed to develop nanocomposite membranes based on sulfonated poly(arylene ether) (sPAE) and evaluate the effect of incorporating sulfonated graphene oxide (sGO) nanosheets on their physicochemical and electrochemical properties for fuel cell applications. The main focus was on the use of sulfonated graphene oxide (sGO) nanosheets as the reinforcing phase.
Materials and Methods: Nanocomposite membranes were prepared by introducing sGO nanoparticles into the sPAE matrix at three different weight percentages of (2, 4, and 6 wt%). The membranes were characterized in terms of ion exchange capacity, water uptake, thermal stability, proton conductivity, and single-cell fuel cell performance.
Results: The results indicated that the membrane containing 2 wt% sGO represented the optimal composition. This membrane exhibited an ion exchange capacity of 1.98 meq/g, reflecting its high proton transfer capability. It also demonstrated a water uptake of 31.8%, ensuring a favorable balance between hydrophilicity and structural integrity. Proton conductivity at 80 °C reached 0.268 S/cm. Furthermore, in single-cell fuel cell tests at 80 °C, the 2 wt% sGO membrane increased current density by 15% and power density by 30% compared to the pristine membrane.
Conclusion: Incorporating 2 wt% sGO into the sPAE membranes significantly enhanced ion exchange capacity, water uptake, and proton conductivity, leading to improved single-cell performance. These findings highlight the potential of sGO-modified sPAE membranes as promising candidates for fuel cell applications.

کلیدواژه‌ها [English]

  • Polymeric fuel cell
  • Proton exchange membrane
  • Sulfonated polyarylene ether
  • Sulfonated graphene oxide
  • Fuel cell membrane
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