BROWSE

ITEM VIEW & DOWNLOAD

Nitrogen-Doped Carbon Nanofibers as an Highly Efficient Electrocatalyst For Zn-Air Batteries

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Nitrogen-Doped Carbon Nanofibers as an Highly Efficient Electrocatalyst For Zn-Air Batteries
Author
Park, Gi Su
Advisor
Cho, Jaephil
Issue Date
2013-02
Publisher
Graduate School of UNIST
Abstract
Nitrogen-doped carbon nanofibers have potential to be an alternative metal-free catalyst for the air-electrodes in fuel cells and metal-air batteries because of their enhanced electro-catalytic activity toward oxygen reduction reaction(ORR). However, the available nitrogen doping precesses require more than one step. Here we report a simple and cost-effective fabrication precess, eletrospinning of polymeric fibers followed by carbonization at 1100℃, for preparation of nitrogen-doped porous carbon nanofibers with extremely high surface are (1271 m2g-1), demonstrating excellent electrocatalytic activity toward ORR at low cost, which is attributed to proper nitrogen-doping and enhanced graphitic characteristics of carbon nanofibers. For example, the performance of a Zn-air cell based on the nitrogen-doped porous carbon nanofibers exhibits a peak power density of 194mW/cm2, comparable to that based on a commercial Pt/C catalyst (192 mW/cm2). Further, the generation of hydrogen peroxide ion(<20%) in a half cell on the new catalyst is similar to that on the commercial Pt/C catalyst.
Description
Battery Science & Technology
URI
Go to Link
Appears in Collections:
ECHE_Theses_Master
Files in This Item:
Nitrogen-Doped Carbon Nanofibers as an Highly Efficient Electrocatalyst For Zn-Air Batteries.pdfDownload

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU