首页|Ultrathin NiO/Ni3S2 Heterostructure as Electrocatalyst for Accelerated Polysulfide Conversion in Lithium-Sulfur Batteries

Ultrathin NiO/Ni3S2 Heterostructure as Electrocatalyst for Accelerated Polysulfide Conversion in Lithium-Sulfur Batteries

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The practical application of Lithium-Sulfur batteries largely depends on highly efficient utilization and conversion of sulfur under the realistic condition of high-sulfur content and low electrolyte/sulfur ratio.Rational design of heterostructure electrocatalysts with abundant active sites and strong interfacial electronic interactions is a promising but still challenging strategy for preventing shuttling of polysulfides in lithium-sulfur batteries.Herein,ultrathin nonlayered NiO/Ni3S2 heterostructure nanosheets are developed through topochemical transformation of layered Ni(OH)2 templates to improve the utilization of sulfur and facilitate stable cycling of batteries.As a multifunction catalyst,NiO/Ni3S2 not only enhances the adsorption of polysulfides and shorten the transport path of Li ions and electrons but also promotes the Li2S formation and transformation,which are verified by both in-situ Raman spectroscopy and electrochemical investigations.Thus,the cell with NiO/Ni3S2 as electrocatalyst delivers an area capacity of 4.8 mAh cm-2 under the high sulfur loading(6 mg cm-2)and low electrolyte/sulfur ratio(4.3 pL mg-1).The strategy can be extended to 2D Ni foil,demonstrating its prospects in the construction of electrodes with high gravimetric/volumetric energy densities.The designed electrocatalyst of ultrathin nonlayered heterostructure will shed light on achieving high energy density lithium-sulfur batteries.

density functional theory simulationLi-S batteriesmultifunction electrocatalystNiO/Ni3S2 heterostructuresultrathin nonlayered nanosheets

Chunqiao Jin、Pengbo Zhai、Jianli Tang、Liuxiang Huo、Qianqian He、Yan Ye、Lingxi Qiu、Kai Jiang、Liyan Shang、Yawei Li、Yongji Gong、Zhigao Hu、Junhao Chu

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Department of Materials,School of Physics and Electronic Science,Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai),Engineering Research Center of Nanophotonics & Advanced Instrument(Ministry of Education),East China Normal University,Shanghai 200241,China

Dr.P.Zhai,School of Materials Science and Engineering,Beihang University,Beijing 100191,China

Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan Shanxi 030006,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key R&D Program of ChinaProjects of Science and Technology Commission of Shanghai MunicipalityProjects of Science and Technology Commission of Shanghai MunicipalityProgram for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning

6209001361974043918333032019YFB220340321JC140210019511120100

2023

10.1002/eem2.12491

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(6)
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