镧掺杂锡酸钡/多壁碳纳米管改性隔膜的制备及其在锂硫电池中的应用  

La-Doped BaSnO_(3)/Multi-walled Carbon Nanotube Modified Separator:Synthesis and Application in Lithium-Sulfur Battery

作　　者：朱绍宽 宋娅 龙翔 欧阳全胜 邵姣婧[1] 石斌 ZHU Shao-Kuan;SONG Ya;LONG Xiang;OUYANG Quan-Sheng;SHAO Jiao-Jing;SHI Bin(School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Advanced Batteries and Materials Engineering Research Center,Guizhou Light Industry Technical College,Guiyang 550025,China;State Key Laboratory of Advanced Chemical Power Sources,Zunyi,Guizhou 563003,China)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]先进电池与材料工程研究中心,贵州省轻工职业技术学院,贵阳550025 [3]先进化学电源国家重点实验室,遵义563003

出　　处：《无机化学学报》2022年第7期1433-1440,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51972070、52062004);贵州省科技计划项目重点类型(黔科合基础[2020]1Z042);贵州省科技支撑项目(黔科合支撑[2021]一般317);贵州大学培育项目(贵大培育[2019]01号);贵州省研究生科研基金立项课题(黔教合YJSCXJH[2020]028)资助。

摘　　要：通过将共沉淀法制备的钙钛矿型氧化物镧掺杂锡酸钡(LBSO)与多壁碳纳米管(MCNT)混合均匀,制成浆料,并利用刮涂法将其涂布在商业隔膜Celgard 2500(PP)表面构筑阻挡层,获得改性隔膜(LBSO/MCNT/PP)。基于该改性隔膜的锂硫电池在0.1C下具有高达1 433 mAh·g^(-1)的初始放电比容量,1C时300次循环后每圈容量衰减率为0.114%;当电流密度提高到3C时,仍具有764 mAh·g^(-1)的放电比容量,表现出优良的倍率性能和循环稳定性,这主要是由于该阻挡层能够有效抑制多硫化物的穿梭。Herein, an interlayer was constructed on the commercial separator Celgard 2500(PP) by doctor blade coating a mixture slurry of perovskite oxide lanthanum doped barium stannate(LBSO) that was prepared by co-precipitation method and multi-walled carbon nanotubes(MCNT). The as-obtained modified separator was named LBSO/MCNT/PP. The lithium-sulfur battery using the modified separator delivered an initial discharge specific capacity up to 1 433 mAh·g^(-1)at 0.1C and a capacity decay rate of 0.114% per cycle over 300 cycles at 1C. As the current density was increased to a 3C rate, a discharge specific capacity of 764 mAh·g^(-1)can still be maintained,showing excellent rate capability and cycling stability, which is ascribed to the effective inhibition of the interlayer towards the shuttle of polysulfides.

关 键 词：锂电池 高储能 镧掺杂锡酸钡 穿梭效应 阻挡层 

分 类 号：O614.331[理学—无机化学]