کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1273191 | 1497487 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Durability improvement at high current density by graphene networks on PEM fuel cell
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Durability improvement at high current density by graphene networks on PEM fuel cell Durability improvement at high current density by graphene networks on PEM fuel cell](/preview/png/1273191.png)
چکیده انگلیسی
This study presents a novel structure of catalyst layers of membrane electrode assemblies (MEAs) by adding graphene to platinum on carbon black (Pt/C) to improve the durability at high current density operation (3Â AÂ cmâ2). Graphene displays outstanding low electrical resistance and has the advantage of high electron mobility. It is also used in lithium ion batteries to improve electrical performance such as high rate charge/discharge capability and cycle-life stability. In this study, three MEAs are compared, and graphene is used as an excellent conductive additive in catalyst layers for better electrons transport at high current density operation. The MEA coated Pt/C mixed with 0.1Â wt% graphene shows best durability for 0.3Â VÂ hâ1 which is almost 3.7 times better than that of without graphene additive (1.1Â VÂ hâ1). The graphene additive effectively extends the durability of the MEA. Furthermore, the MEAs are analyzed by AC impedance. The impedance arc of the MEA coated with Pt/C only is getting worse, but those two coated with graphene show similar and smaller impedance arcs after high current density operation for 80Â h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 22, 24 July 2014, Pages 11706-11712
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 22, 24 July 2014, Pages 11706-11712
نویسندگان
Chia-Chi Sung, Chao-Yang Liu, Colin C.J. Cheng,