首页|Construction of MnS/MoS2 heterostructure on two-dimensional MoS2 surface to regulate the reaction pathways for high-performance Li-O2 batteries

Construction of MnS/MoS2 heterostructure on two-dimensional MoS2 surface to regulate the reaction pathways for high-performance Li-O2 batteries

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The inherent catalytic anisotropy of two-dimensional(2D)materials has limited the enhancement of Li-O2 batteries(LOBs)performance due to the significantly different adsorption energies on 2D and edge surfaces.Tuning the adsorption strength in 2D materials to the reaction intermediates is essential for achieving high-performance LOBs.Herein,a MnS/MoS2 heterostructure is designed as a cathode catalyst by adjusting the adsorption behavior at the surface.Different from the toroidal-like discharge products on the MoS2 cathode,the MnS/MoS2 surface displays an improved adsorption energy to reaction species,thereby promoting the growth of the film-like discharge products.MnS can disturb the layer growth of MoS2,in which the stack edge plane features a strong interaction with the intermediates and limits the growth of the discharge products.Experimental and theoretical results confirm that the MnS/MoS2 heterostructure possesses improved electron transfer kinetics at the interface and plays an important role in the adsorption process for reaction species,which finally affects the morphology of Li2O2.In conse-quence,the MnS/MoS2 heterostructure exhibits a high specific capacity of 11696.0 mA h g-1 and good cycle stability over 1800 h with a fixed specific capacity of 600 mA h g-1 at current density of 100 mA g-1.This work provides a novel interfacial engineering strategy to enhance the performance of LOBs by tuning the adsorption properties of 2D materials.

Li-O2 batteriesTwo-dimensional materialsMnS/MoS2 heterostructureEdge planeAdsorption behavior

Guoliang Zhang、Han Yu、Xia Li、Xiuqi Zhang、Chuanxin Hou、Shuhui Sun、Yong Du、Zhanhu Guo、Feng Dang

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Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials(Ministry of Education),Shandong University,Jinan 250061,Shandong,China

School of Environmental and Material Engineering Yantai University,Yantai 264005,Shandong,China

Institute National de la Recherche Scientifique,Centre Énergie Matériaux et Télécommunications,Varennes,Québec J3 × 1S2,Canada

State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,Hunan,China

Integrated Composites Lab,Department of Mechanical and Construction Engineering,Northumbria University,Newcastle Upon Tyne,NE1 8ST,UK

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMajor basic research project of Natural Science Foundation of Shandong ProvinceState Key Laboratory of Marine Resource Utilization in South China Sea(Hainan University)Open Program of Guangxi Key Laboratory of Information Materials

5217328652207249ZR2023ZD12MRUKF2023013221024-K

2024

10.1016/j.jechem.2024.01.076

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
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