کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1272172 1497479 2014 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of new self-humidifying composite membrane by incorporating graphene and phosphotungstic acid into sulfonated poly(ether ether ketone) film
ترجمه فارسی عنوان
آماده سازی غشای جدید خود رطوبت کامپوزیت با ترکیب گرافن و اسید فسفوردورفیکیک به فیلم سلفی پلی (اتر اتر کتون)
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• A new kind of hybrid self-humidifying membrane was developed with multicomponents.
• Graphene and phosphotungstic acid contributed for self-humidifying properties.
• High proton conductivity was witnessed at temperatures >60 °C.
• A plausible mechanism for enhancement of self-humidifying properties is suggested.

In this work, a combination of constituent materials capable of improving the moisture retention and proton conductivity (PC) was incorporated into sulfonated poly (ether ether ketone) (SPEEK) membranes in order to prepare new, self-humidifying composite membranes (SHMs) for proton exchange membrane fuel cells. The property-improving components were incorporated into the cast SPEEK film in an appropriate microstructural architecture to prepare the SHMs with increased water retention and PC. SHMs were therefore prepared with the inclusion of carboxyl-functionalized graphene (G(c)) and phosphotungstic acid (PWA) with varying proportions into the SPEEK film. The structure of the SPEEK/G(c)/PWA composite membranes was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, thermogravimetric analysis and X-ray photoelectron spectroscopy. The physicochemical properties of the composite membranes, such as ion exchange capacity, water uptake, thermal stability and PC, were investigated. This work provides confirmation that self-humidifying properties are improved at temperature above 60 °C through a combinational inclusion of G(c) and PWA within SPEEK and the new self-humidifying membranes have potential for use in medium temperature direct methanol fuel cells.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 30, 13 October 2014, Pages 17162–17177
نویسندگان
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