کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6609900 | 459548 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Self-standing, binder-free electrospun Co3O4/carbon nanofiber composites for non-aqueous Li-air batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, self-standing, binder-free ZIF-9 derived Co3O4/carbon nanofiber composites were synthesized via electrospinning and post thermal treatment for use as the cathode in a non-aqueous Li-air battery. Due to possessing a three-dimensional cross-linked web structure, Co3O4/carbon nanofiber composites are used directly as the cathode for Li-air batteries without the use of any binders or conductive metal foam, thus alleviating undesirable chemical reactions. We confirm that metallic cobalt (Co) in ZIF-9 is successfully oxidized to cobalt oxide (Co3O4) following two thermal treatment steps by analysis of XRD and XPS. The initial discharge capacity of Co3O4/carbon nanofiber composites exceeds 760 mAh gâ1, which is a much higher discharge capacity compared to pristine carbon nanofiber (72 mAh gâ1). Additionally, Co3O4/carbon nanofiber composite based cells exhibit improved cycling properties and a lower charge overpotential at various current densities. The improved electrochemical properties of the Co3O4/carbon nanofiber composites are attributed to the catalytic activity and stable contact with the homogeneously distributed Co3O4 in the carbon nanofiber structure. This work demonstrates that the synthesized Co3O4/carbon nanofiber composites could possibly be applied for use as next generation electrode materials for energy storage and conversion devices, particularly Li-air batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 182, 10 November 2015, Pages 289-296
Journal: Electrochimica Acta - Volume 182, 10 November 2015, Pages 289-296
نویسندگان
Myeong Jun Song, Il To Kim, Young Bok Kim, Moo Whan Shin,