摘要
为解决锂硫(Li-S)电池在实际应用中S和Li_(2)S_(2)/Li_(2)S不导电、体积膨胀和多硫化物的“穿梭效应”等问题,本次试验采用化学活化法制备剑麻基生物碳(AC),熔融扩散法制备碳/硫复合正极材料(ACS),因多壁碳纳米管(MWCNTs)具有独特的三维结构,可以抑制多硫化物的穿梭效应,将其作为隔膜涂层(YTC)。试验结果表明,在0.10 C倍率下,YTC电池的初始放电容量为974.3 mAh·g^(-1),循环200圈后容量保持在622 mAh·g^(-1)。进一步说明在隔膜上涂覆MWCNTs与正极材料结合,可提高材料导电性和抑制多硫化物的穿梭效应,表现出良好的循环性能和库伦效率。
Sisal-based biological carbon(AC)was prepared with chemical activation method and carbon/sulfur composite cathode material(ACS)was prepared with melting diffusion method to solve the problems of non-conductivity and volume expansion of S and Li_(2)S_(2)/Li_(2)S,and"shuttle effect"of polysulfide in the practical application of lithium sulfur(Li-S)batteries.Featured a unique three-dimensional structure,multi-walled carbon nanotubes(MWCNTs)were taken as diaphragm coating(YTC)to restrain the shuttle effect of polysulfide.The results showed that the initial discharge capacity of YTC battery was 974.3 mAh·g^(-1) at 0.10 C rate,and remained 622 mAh·g^(-1) after 200 cycles,indicating that coating MWCNTs on diaphragm combined with positive electrode material could improve the conductivity of the material and inhibit the shuttle effect of polysulfide,showing good cycling performance and coulomb efficiency.
作者
柴英杰
雷紫杰
王利江
李巍
李博文
王薇妍
赵夏雨
赵桐
韩璐
张志伟
沈星星
蔡爱军
CHAI Yingjie;LEI Zijie;WANG Lijiang;LI Wei;LI Bowen;WANG Weiyan;ZHAO Xiaoyu;ZHAO Tong;HAN Lu;ZHANG Zhiwei;SHEN Xingxing;CAI Aijun(College of Chemical Engineering,Hebei Normal University of Science&Technology,Qinhuangdao Hebei,066600,China;College of Marine Resources and Environment,Hebei Normal University of Science&Technology,Qinhuangdao Hebei,066600,China)
出处
《河北科技师范学院学报》
CAS
2024年第1期62-70,共9页
Journal of Hebei Normal University of Science & Technology
基金
国家自然科学基金项目(项目编号:21501043)
河北省省级科技计划资助(项目编号:21327310D)
河北省高等学校科学技术研究项目(项目编号:ZD2016086)
2022年度大中学生科技创新能力培育专项项目(项目编号:202151001010544)
河北省大学生创新创业训练计划项目(项目编号:S202310798010,X2023016)
河北科技师范学院研究生创新项目(项目编号:CXZZ202107,CXZZSS2022092)
2022年研究生课程思政示范项目(项目编号:YKCSZ2022117)。
关键词
Li-S电池
多硫化物
正极材料
隔膜涂层
Li-S battery
polysulfide
positive electrode material
diaphragm coating