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

作　　者：Rin Na Kyeongseok Min Hyejin Kim Yujin Son Sang Eun Shim Sung-Hyeon Baeck 

机构地区：[1]Department of Chemistry and Chemical Engineering,Education and Research Center for Smart Energy Materials and Process,Inha University,Incheon 22212,Republic of Korea

出　　处：《Journal of Energy Chemistry》2023年第9期140-152,共13页能源化学（英文版）

基　　金：supported by the Korea Institute for Advancement of Technology (KIAT);the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (P0017363);the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT). (2023R1A2C1003312)。

摘　　要：Herein,a facile synthetic strategy is proposed to fabricate high-performance electrocatalysts for rechargeable Zn-air batteries(ZABs).Heterostructured NiCo/NiCo_(2)S_(4) nanoparticles encapsulated in N-,S-co-doped CNT(NiCo/NiCo_(2)S_(4)@NSCNT) are synthesized via co-precipitation,thermal carbonization,and partial sulfidation processes.The strongly coupled NiCo/NiCo_(2)S_(4) 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 oxygen reduction reaction(ORR).The prepared NiCo/NiCo_(2)S_(4)@NSCNT electrocatalyst exhibits a low overpotential 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/NiCo_(2)S_(4)@NSCNT can provide superior specific capacity(756.16 mA h g_(Zn)^(-1)],peak power density(155.82 mW cm^(-2)),and long-term cyclability compared to those of the precious metal-based electrocatalyst(Pt/C+RuO_(2)).

关 键 词：Bifunctional electrocatalyst NiCo alloy Bimetallic sulfide Heterojunction Zinc–air battery 

分 类 号：TM911.41[电气工程—电力电子与电力传动] O643.36[理学—物理化学]