Boosting electrocatalytic activity with the formation of abundant heterointerfaces and N, S dual-doped carbon nanotube for rechargeable Zn-air battery

被引:22
作者
Na, Rin [1 ]
Min, Kyeongseok [1 ]
Kim, Hyejin [1 ]
Son, Yujin [1 ]
Shim, Sang Eun [1 ]
Baeck, Sung-Hyeon [1 ]
机构
[1] Inha Univ, Educ & Res Ctr Smart Energy Mat & Proc, Dept Chem & Chem Engn, Incheon 22212, South Korea
来源
JOURNAL OF ENERGY CHEMISTRY | 2023年 / 84卷
基金
新加坡国家研究基金会;
关键词
Bifunctional electrocatalyst; NiCo alloy; Bimetallic sulfide; Heterojunction; Zinc-air battery; OXYGEN REDUCTION REACTION; REDUCED GRAPHENE OXIDE; HYDROGEN EVOLUTION; NITROGEN; NANOPARTICLES; PERFORMANCE; NICO2S4; ALLOY; NANOSHEETS; CO;
D O I
10.1016/j.jechem.2023.05.040
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Herein, a facile synthetic strategy is proposed to fabricate high-performance electrocatalysts for rechargeable Zn-air batteries (ZABs). Heterostructured NiCo/NiCo2S4 nanoparticles encapsulated in N-, S-co-doped CNT (NiCo/NiCo2S4@NSCNT) are synthesized via co-precipitation, thermal carbonization, and partial sulfidation processes. The strongly coupled NiCo/NiCo2S4 heterostructure can improve the redox property and charge transfer ability. Also, the CNTs with abundant foreign dopants provide high electrical conductivity and abundant defect sites for both the oxygen evolution reaction (OER) and oxy-gen reduction reaction (ORR). The prepared NiCo/NiCo2S4@NSCNT electrocatalyst exhibits a low overpo-tential of 349 mV at a current density of 10 mA cm-2 and a half-wave potential of 0.865 V for the OER and ORR, respectively. Moreover, the ZAB assembled using as-prepared NiCo/NiCo2S4@NSCNT can provide superior specific capacity (756.16 mA h gZn-1), peak power density (155.82 mW cm-2), and long-term cyclability compared to those of the precious metal-based electrocatalyst (Pt/C + RuO2).& COPY; 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
引用
收藏
页码:140 / 152
页数:13
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