基于N,P共掺杂碳纳米片的富S空位Co/Co<sub>9</sub>S<sub>8</sub>复合物作为双功能催化剂用于可充锌-空气电池

doi:10.11896/cldb.23010013

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Abstract Rechargeable Zn-air battery has attracted widespread attention due to the high theoretical energy density, environmental friendliness and safety. However, the performance of Zn-air battery was limited by the slow kinetics of oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) on the cathodic electrode. Therefore, it is important to develop efficient bifunctional catalysts. In this work, S-vacancy-rich Co/Co₉S₈ composites based on N, P co-doped carbon nanosheets (Co/Co₉S₈@N, P-C) was prepared by a simple one-step sintering method. X-ray diffractometer and transmission electron microscopy were used to analyze the crystalline structure and fine morphology. And the results show that Co/Co₉S₈ composites based on N, P co-doped carbon nanosheets were successfully prepared. The results of X-ray photoelectron spectroscopy and electron spin resonance showed that Co/Co₉S₈ nanocomposites with S-vacancy-rich were synthesized. The results of electrochemical testing indicate that the nanocomposites exhibit excellent ORR and OER bifunctional catalytic activity (ΔE=0.73 V). Compared with Zn-air battery prepared based on Pt/C+Ir/C catalyst as cathode, Zn-air battery prepared with S-vacancy-rich containing Co/Co₉S₈@N, P-C as cathode catalysts have 1.48 V open-circuit voltage (Pt/C+Ir/C:1.46 V), the power density of 80 mW·cm^-2 (Pt/C+Ir/C:87.3 mW·cm^-2) and 170 h cycle stability (Pt/C+Ir/C:146 h). This work provides a new idea for rational design of non-noble metal bifunctional catalysts for Zn-air battery.

Key words： sulfur vacancy oxygen evolution reaction oxygen reduction reaction bifunctional oxygen electrocatalyst Zn-air battery

Published: 25 June 2024 Online: 2024-07-17

CLC number:	G31
	TK02

Fund:Shaanxi Province ‘Sanqin Scholars' Innovation Team Support Program (Clean Energy Materials and High Performance Devices Innovation Team of Shaanxi Dongling Smelting Limited Company), National Natural Science Foundation of China (51801001), the Provincial Key Research and Development Program of Shaanxi (2019GY-197), the Basic Research Plan of Natural Science of Shaanxi (20151M5215), China Post-Doctoral Science Foundation Project (2016M601878), Baoji Science and Technology Plan Project (16RKX1-29), Special Scientific Research Project of Shaanxi Education Department (21JK0478), Key Project of Baoji University of Arts and Sciences (209040127), Shaanxi Thousand People Program Youth Project, Key Laboratory of Materials Physics and Functional Devices of Baoji.

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	Articles by authors
	CHEN Yanan
	LIU Peitao
	ZU Yanqing
	HAN Fengbo
	LI Xiaodong
	BI Pengfei
	FENG Ailing

Cite this article:

CHEN Yanan,LIU Peitao,ZU Yanqing, et al. S-Vacancy-Rich Co/Co₉S₈ Composites Based on N, P Co-doped Carbon Nanosheets as a Bifunctional Catalyst for Rechargeable Zn-Air Battery[J]. Materials Reports, 2024, 38(12): 23010013-5.

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http://www.mater-rep.com/EN/10.11896/cldb.23010013 OR http://www.mater-rep.com/EN/Y2024/V38/I12/23010013

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