BROWSE

Related Researcher

Author

Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

ITEM VIEW & DOWNLOAD

Highly active bifunctional oxygen electrocatalysts derived from nickel- or cobalt-phytic acid xerogel for zinc-air batteries

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Highly active bifunctional oxygen electrocatalysts derived from nickel- or cobalt-phytic acid xerogel for zinc-air batteries
Author
Wang, ShuaiNam, GyutaeLi, PingJang, HaeseongWang, JiaKim, Min GyuWu, ZexingLiu, XienCho, Jaephil
Issue Date
201809
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.10, no.33, pp.15834 - 15841
Abstract
Developing highly efficient non-noble metal electrocatalysts for oxygen electrode reactions is highly desirable for industrial scale application in energy related devices. Herein, two new kinds of Ni (POxN3-x)(2)/NPC and Co (POxN3-x)(2)/NPC (NPC: N, P-co-doped carbon) are synthesized through a facile post-treatment of nickel- or cobalt-phytic acid xerogel, followed by an annealing procedure under an argon and ammonia atmosphere at 800 degrees C. The as-prepared catalysts exhibit outstanding catalytic activities for both the oxygen reduction and evolution reactions, which are comparable to those of Pt/C and IrO2. Furthermore, the primary zinc-air batteries assembled with Ni (POxN3-x)(2)/NPC and Co (POxN3-x)(2)/NPC as the cathodes show gravimetric energy densities of 894 and 836 W h kg(Zn)(-1), which are superior to that of Pt/C (793 W h kg(Zn)(-1)). In addition, the rechargeable zinc-air battery assembled with Ni (POxN3-x)(2)/NPC exhibits an excellent round-trip efficiency, which is shown by a slight increase in the sum of the overpotentials for discharge-charge cycling at a current density of 20 mA cm(-2), even after experiencing 33 h of testing. To the best of our knowledge, there are few reports on metaphosphate salts where oxygen is partially replaced by nitrogen as bifunctional oxygen electrode catalysts for zinc-air batteries. This work provides an easy, low-cost and scalable avenue to develop new kinds of catalyst for application in energy devices.
URI
Go to Link
DOI
http://dx.doi.org/10.1039/c8nr04733b
ISSN
2040-3364
Appears in Collections:
ECHE_Journal Papers

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