双钙钛矿抑制锂硫电池穿梭效应的实验设计  

Design of experiment using double perovskite to inhibit shuttle effects in lithium-sulfur batteries

作　　者：刘鹏云 齐日新 徐静 李学进 邢伟 LIU Pengyun;QI Rixin;XU Jing;LI Xuejin;XING Wei(School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)材料科学与工程学院,山东青岛266580

出　　处：《实验技术与管理》2024年第2期90-97,共8页Experimental Technology and Management

基　　金：国家自然科学基金项目(52202337,52277229);教育部产学合作协同育人项目(221005402105010)。

摘　　要：该文设计了La_(2)CoMnO_(6)双钙钛矿氧化物应用于锂硫电池抑制穿梭效应的研究型综合实验。实验通过溶胶凝胶法制备La_(2)CoMnO_(6)双钙钛矿氧化物,并首次将其用作锂硫电池正极添加剂。通过La_(2)CoMnO_(6)对多硫化锂的静态可视化吸附实验、催化实验以及锂硫电池电化学性能测试,考察了该添加剂对多硫化锂穿梭效应的抑制效果及机制。该实验有助于激发学生的创新精神和科研兴趣,培养综合运用所学理论知识进行科学研究和解决实际问题的能力。[Objective]As global demand for renewable energy grows,the development of sustainable energy storage devices with high energy density becomes increasingly crucial.Owing to their high energy density and cost-effectiveness,lithium–sulfur(Li–S)batteries have been regarded as the most promising next-generation energy storage systems.However,several challenges hinder their practical applications,notably the shuttle effects of soluble lithium polysulfides(LiPSs).This issue leads to rapid capacity decay and a short cycling lifespan,severely limiting the development of Li–S batteries.Thus,it is imperative to discover and design various novel materials for use in Li–S batteries to inhibiting the shuttle effects of LiPSs and explore the underlying mechanism.In the context of“Emerging Engineering Education,”cultivating students’innovative thinking and problem-solving abilities is also highly important.However,the current experimental teaching rarely emphasizes Li–S batteries and the key issue of LiPSs’shuttle effects.Therefore,a comprehensive research experiment on the shuttle effects of Li–S batteries has been designed to deepen students’understanding of the working principles and challenges of these types of batteries.This experiment aims to suppress the shuttle effects of LiPSs in Li–S batteries using a typical double perovskite as an inhibitor.[Methods]Specifically,a double perovskite oxide La_(2)CoMnO_(6) is synthesized via a simple solgel method.Then,a static visual adsorption experiment of La_(2)CoMnO_(6) to Li_(2)S_(6),as well as a catalytic experiment using La_(2)CoMnO_(6) as a catalyst,are designed to investigate the chemical absorption and catalytic efficiency of La_(2)CoMnO_(6) to LiPSs and analyze the inhibition effect of La_(2)CoMnO_(6) on the shuttle effects of LiPSs.Finally,a suitable amount of La_(2)CoMnO_(6) powder was applied as a cathode additive to explore the influence of La_(2)CoMnO_(6) inhibitors on the electrochemical performance and cycling lifespan of Li–S batteries.[Resu

关 键 词：实验设计 双钙钛矿氧化物 锂硫电池 穿梭效应 

分 类 号：TM911.1[电气工程—电力电子与电力传动] C45[社会学]