ZnO/ZnS heterostructure in N-doped porous carbon for anchoring-diffusion-conversion of polysulfides for high-performance lithium-sulfur batteries  

作　　者：Fei Wang Rong-Wei Huang Wen-Chang Han Chun-Man Yang Wen-Hao Yang Peng Dong Chao-Ling Wu Yi-Yong Zhang Xue Li Ying-Jie Zhang 

机构地区：[1]National Local Joint Engineering Research Center for LithiumIon Batteries and Materials Preparation Technology,Key Laboratory of Advanced Batteries Materials of Yunnan Province,Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]Engineering Research Center of Alternative Energy Materials and Devices,Sichuan University,Ministry of Education,Chengdu 610065,China

出　　处：《Rare Metals》2024年第8期3661-3676,共16页稀有金属（英文版）

基　　金：financially supported by Yunnan Major Scientific and Technological Projects (No.202202AG050003);Yunnan Fundamental Research Projects (Nos.202101BE070001-018 and 202201AT070070)。

摘　　要：The shuttle effect of polysulfides is one of the key factors hindering the commercialization of lithiumsulfur batteries(LSBs).Owing to their high conductivity and advantageous structure,heterostructures can be used in sulfur fixation and catalysis of LSBs.In this study,a flower-shaped ZnO/ZnS heterostructure on a nitrogendoped porous carbon(NPC) sulfur host was designed.The ZnO/ZnS heterostructure regulates the electronic structure of the material and exhibits higher metal-like properties.Moreover,the ZnO/ZnS heterostructure combines the strong adsorption property of ZnO and the high catalytic ability of ZnS to realize the anchoring-diffusionconversion of lithium poly sulfides(LiPSs).Results reveal that the developed ZnO/ZnS@NPC/S cathode has excellent electrochemical performance in LSBs,achieving a high discharge specific capacity of 1365.3 mAh·g^(-1) at 0.1C and excellent rate capability(719 mAh·g^(-1) at 2C;the capacity decay rate is only 0.042% per cycle after 1000 cycles).Even under a high sulfur loading-E/S(electrolyte/sulfur)ratio of 5.1 mg·cm^(-2)-6 μl·mg^(-1),a high specific capacity of 723.7 mAh·g^(-1) is maintained after 60 cycles.This study provides a new strategy for a multifunctional sulfur host that can effectively alleviate the shuttle effect of LiPSs and improve the utilization of sulfur active substances.

关 键 词：ZnO/ZnS heterostructure Lithium-sulfur batteries Density functional theory Anchor CONVERSION 

分 类 号：TM912[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]