Co(OH)2-NiCo2O4 hybrid nanosheets coupled with N-doping reduced graphene oxide as efficient electrocatalysts for Zn-air batteries

2-dimensional Co(OH)2-NiCo2O4 hybrid nanosheets coupled with N-doping reduced graphene oxide (N-RGO) have been prepared by a facile two-step hydrothermal method for exploring the cost-effective and durable bifunctional oxygen electrocatalysts of Zn-air batteries. Co(OH)2-NiCo2O4/N-RGO exhibits the e...

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Veröffentlicht in:Journal of alloys and compounds 2021-08, Vol.872, p.159441, Article 159441
Hauptverfasser: Peng, Xiaomin, Zhang, Jinming, Cen, Tianlun, Ye, Zhifeng, Liu, Yiyi, Yuan, Dingsheng
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Sprache:eng
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Zusammenfassung:2-dimensional Co(OH)2-NiCo2O4 hybrid nanosheets coupled with N-doping reduced graphene oxide (N-RGO) have been prepared by a facile two-step hydrothermal method for exploring the cost-effective and durable bifunctional oxygen electrocatalysts of Zn-air batteries. Co(OH)2-NiCo2O4/N-RGO exhibits the excellent catalytic activity for ORR with a positive half-wave potential of 0.80 V vs. RHE in 0.1 M KOH. And the assembled rechargeable Zn-air battery achieves a high open-circuit voltage of 1.485 V, a large peak power density of 99 mW cm−2, and a remarkable cycle life of over 180 h. This work offers an inspiration to obtain efficient electrocatalysts for sustainable energy devices. [Display omitted] •2D Co(OH)2-NiCo2O4/N-RGO is obtained by a facile two-step hydrothermal method.•The synergistic effects of Co(OH)2-NiCo2O4 and N-RGO enhance the activity of ORR and OER.•The assembled rechargeable ZABs achieve the remarkable performance and stability.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.159441