Ultrathin NiO/Ni_(3)S_(2)Heterostructure as Electrocatalyst for Accelerated Polysulfide Conversion in Lithium-Sulfur Batteries

作     者：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 

作者机构：Department of MaterialsSchool of Physics and Electronic ScienceTechnical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai)Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)East China Normal UniversityShanghai 200241China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan Shanxi 030006China School of Materials Science and EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2023年第6卷第6期

页      面：182-190页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant nos.62090013,61974043,and 91833303) the National Key R&D Program of China(Grant no.2019YFB2203403) the Projects of Science and Technology Commission of Shanghai Municipality(Grant nos.21JC1402100 and 19511120100) the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning 

主　　题：density functional theory simulation Li-S batteries multifunction electrocatalyst NiO/Ni_(3)S_(2)heterostructures ultrathin nonlayered nanosheets 

摘      要：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 *** 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 ***,ultrathin nonlayered NiO/Ni_(3)S_(2)heterostructure nanosheets are developed through topochemical transformation of layered Ni(OH)_(2)templates to improve the utilization of sulfur and facilitate stable cycling of *** a multifunction catalyst,NiO/Ni_(3)S_(2)not only enhances the adsorption of polysulfides and shorten the transport path of Li ions and electrons but also promotes the Li_(2)S formation and transformation,which are verified by both in-situ Raman spectroscopy and electrochemical ***,the cell with NiO/Ni_(3)S_(2)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 *** designed electrocatalyst of ultrathin nonlayered heterostructure will shed light on achieving high energy density lithium-sulfur batteries.