TY - JOUR
T1 - NiCoS/carbon black based bifunctional air electrode for Zn-air secondary batteries
AU - Tangaemsakul, Nuttasith
AU - Kannan, Arunachala
AU - Tantavichet, Nisit
N1 - Funding Information:
This work was supported by the Ratchadaphiseksomphot Endowment Fund of Chulalongkorn University, Thailand (CU-GR_62_41_23_15).
Funding Information:
This work was supported by the Ratchadaphiseksomphot Endowment Fund of Chulalongkorn University , Thailand ( CU-GR_62_41_23_15 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/8/25
Y1 - 2021/8/25
N2 - Nickel cobalt sulfide bifunctional catalysts were synthesized on a carbon black (CB) catalyst support through hydrothermal and solvothermal methods for the oxygen reduction (ORR) and evolution reactions (OER) in secondary rechargeable Zn-air batteries. It was found that NiCo2S4/CB was more suitable to be synthesized using ethylene glycol as the dispersing agent than water, and had better ORR/OER catalytic activities than the NiCoS composites with other Ni/Co ratios. In particular, NiCo2S4 showed significantly enhanced electrocatalytic activities when incorporated with CB to form NiCo2S4/CB, with superior ORR/OER electrocatalytic activities compared to NiCo2O4/CB. Even though, the ORR electrocatalytic activity was lower compared to Pt/C, NiCo2S4/CB showed a significantly superior OER activity (~ 0.75 V @ 10 mA cm−2), demonstrating better overall bifunctional characteristics towards the ORR and OER. The NiCo2S4/CB based bifunctional air electrode in a Zn-air single cell exhibited a higher stability (≤1.0 V charge/discharge plateau separation for 400 cycles) and longer cycle life (>500 cycles) than Pt/C (~ 250 cycles), and so has potential commercial viability.
AB - Nickel cobalt sulfide bifunctional catalysts were synthesized on a carbon black (CB) catalyst support through hydrothermal and solvothermal methods for the oxygen reduction (ORR) and evolution reactions (OER) in secondary rechargeable Zn-air batteries. It was found that NiCo2S4/CB was more suitable to be synthesized using ethylene glycol as the dispersing agent than water, and had better ORR/OER catalytic activities than the NiCoS composites with other Ni/Co ratios. In particular, NiCo2S4 showed significantly enhanced electrocatalytic activities when incorporated with CB to form NiCo2S4/CB, with superior ORR/OER electrocatalytic activities compared to NiCo2O4/CB. Even though, the ORR electrocatalytic activity was lower compared to Pt/C, NiCo2S4/CB showed a significantly superior OER activity (~ 0.75 V @ 10 mA cm−2), demonstrating better overall bifunctional characteristics towards the ORR and OER. The NiCo2S4/CB based bifunctional air electrode in a Zn-air single cell exhibited a higher stability (≤1.0 V charge/discharge plateau separation for 400 cycles) and longer cycle life (>500 cycles) than Pt/C (~ 250 cycles), and so has potential commercial viability.
KW - Nickel cobalt sulfide
KW - Oxygen evolution
KW - Oxygen reduction
KW - Secondary Zn-air cell
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U2 - 10.1016/j.jallcom.2021.159749
DO - 10.1016/j.jallcom.2021.159749
M3 - Article
AN - SCOPUS:85104295269
SN - 0925-8388
VL - 873
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 159749
ER -