摘要
利用碳纳米纤维(CNFs)网络结构固定三维针状氧化锌(ZnO)晶须,从而制备得到ZnO/CNFs中间层,并通过中间层曲折的孔隙通道,延长多硫化锂的穿梭路径,使其能稳定的通过化学吸附和物理吸附对锂硫电池的“穿梭效应”进行抑制,通过充放电测试和循环测试等表征结果表明,在0.1 C的电流密度下,电池初始放电容量达1458 mAh·g^(-1),库仑效率保持在99.4%;在0.5 C的电流密度下,初始放电容量仍能达到1113 mAh·g^(-1),经过300次的充放电循环后,放电容量依然维持在734 mAh·g^(-1).
Using carbon nanofibers(CNFs)network structure to fix three-dimensional acicular zinc oxide(ZnO)whiskers,thereby preparing an intermediate layer of ZnO/CNFs,and through the tortuous pore channels of the intermediate layer,the shuttle path of lithium polysulfide is prolonged,so that it can Stably inhibits the"shuttle effect"of lithium-sulfur batteries through chemical adsorption and physical adsorption.Characterization results such as charge-discharge test and cycle test show that the initial discharge capacity of the battery reaches 1458 mAh·g^(-1) at a current density of 0.1 C,The coulombic efficiency remains at 99.4%;at a current density of 0.5 C,the initial discharge capacity can still reach 1113 mAh·g^(-1),and after 300 cycles of charge and discharge,the discharge capacity remains at 734 mAh·g^(-1).
作者
李金宝
黎金桂
修慧娟
杜晓云
王芝
张天聪
赵海芝
LI Jin-bao;LI Jin-gui;XIU Hui-juan;DU Xiao-yun;WANG-Zhi;ZHANG Tian-cong;ZHAO Hai-zhi(College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper, Shaanxi University of Science & Technology, Xi′an 710021, China)
出处
《陕西科技大学学报》
北大核心
2022年第1期13-18,24,共7页
Journal of Shaanxi University of Science & Technology
基金
国家“十三五”重点研发计划项目(2017YFB0307901)。
关键词
氧化锌晶须
碳纳米纤维
隔膜
锂硫电池
zinc oxide whisker
carbon nanofibers
separator
lithium sulfur battery
