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

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Fe-N-C combined with Fe 100-x-y-z P x O y N z porous hollow spheres on a phosphoric acid group-rich N-doped carbon as an electrocatalyst for zinc-air battery

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Title
Fe-N-C combined with Fe 100-x-y-z P x O y N z porous hollow spheres on a phosphoric acid group-rich N-doped carbon as an electrocatalyst for zinc-air battery
Author
Yuan, BingNam, GyutaeLi, PingWang, ShuaiLiu, XienCho, Jaephil
Issue Date
2019-07
Publisher
Elsevier B.V.
Citation
APPLIED SURFACE SCIENCE, v.481, pp.498 - 504
Abstract
Replacing the commercial Pt/C with non-precious metal-based electrocatalysts in the proton exchange membrane fuel cells and metal-air batteries is still challenging. Herein, an electrocatalyst (described as Fe-N-C/Fe 100-x-y-z P x O y N z /NPC, NPC is N, P co-doped carbon) composed of multiple active components, such as NPC, iron-based porous hollow spheres and Fe-N-C, is reported, which exhibits an excellent activity that is comparable to state-of-the-art Pt/C for half-cell and full zinc-air battery in alkaline media. This catalyst exhibits an excellent activity with a half-wave potential of 0.86 V for the ORR in alkaline media, which is 10 mV more positive than to that of Pt/C (0.85 V), and a gravimetric energy density for zinc-air battery is up to 675 Wh Kg zn −1 . The excellent activity is attributed to the synergetic effect of active NPC, iron-based porous hollow spheres (Fe 100-x-y-z P x O y N z ) and Fe-N-C in its structure. In addition, phosphoric acid groups are partially remained in the structure for our catalyst that make the catalyst excellent hydrophilicity. This work adds a new member into family of non-precious metal-based ORR electrocatalysts.
URI
https://scholarworks.unist.ac.kr/handle/201301/26462
URL
https://www.sciencedirect.com/science/article/pii/S0169433219307561?via%3Dihub
DOI
10.1016/j.apsusc.2019.03.137
ISSN
0169-4332
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