高等学校化学学报2024，Vol.45Issue(1)：10-18,9.DOI:10.7503/cjcu20230325
MoS2纳米片功能化PAN锂金属电池隔膜的制备及锂枝晶抑制作用
Fabrication of MoS2 Nanosheets Functionalized PAN Lithium Metal Battery Separator and Its Inhibition of Lithium Dendrite
摘要
Abstract
Guiding the uniform distribution of Li+ flux can effectively inhibit the formation and growth of lithium dendrites,promoting the industrial application of lithium metal batteries.In this study,MoS2 nanosheets with single or few layers,completed structure were prepared by chemical intercalation method,then two-dimensional MoS2 nanosheets were sprayed onto electrospun polyacrylonitrile(PAN)fiborus membrane to obtain MoS2@PAN composite separator.The introduction of MoS2 coating not only improved ion conductivity(1.02 mS/cm),Li+ transfer number(0.59),and electrolyte affinity,but also reduced the pore size of the composite membrane,resulting in a uniform pore size distribution.Synergistic effect of these characteristics regulated the Li+ flow through MoS2@PAN separator and promoted the uniform Li deposition on the surface of lithium metal,inhibiting the formation and growth of lithium dendrites.Therefore,the Li/Li symmetric cell with MoS2@PAN separator achieved a stable cycle with a low overpotential of 14 mV for 500 h at 1 mA/cm2,and there was no obvious lithium dendrite growth on the Li anode surface after cycling.Moreover,the LiFePO4/Li battery assembled with MoS2@PAN separator maintained an initial capacity of 92%after 550 cycles at 2C,demonstrating more stable cycling performance.This study redistributes the Li+ flux through a separator to achieve uniform Li deposition,providing a feasible strategy for suppressing the formation and growth of lithium dendrites.关键词
二维材料/MoS2纳米片/锂金属电池隔膜/调节Li+通量/抑制锂枝晶形成-生长Key words
Two-dimensional material/MoS2 nanosheet/Lithium metal battery separator/Regulating Li+ flux/Suppressing the formation and growth of lithium dendrites分类
化学化工引用本文复制引用
董帮达,翟云云,刘海清,黄振鹏,李祖光,李蕾..MoS2纳米片功能化PAN锂金属电池隔膜的制备及锂枝晶抑制作用[J].高等学校化学学报,2024,45(1):10-18,9.基金项目
浙江省自然科学基金(批准号:LGF21E030003,LTGC23B050004)、国家自然科学基金(批准号:51503079)和嘉兴市科技计划项目(批准号:2021AD10012)资助.Supported by the Zhejiang Provincial Natural Science Foundation,China(Nos.LGF21E030003,LTGC23B050004),the National Natural Science Foundation of China(No.51503079)and the Project of Jianxing Science and Technology,China(No.2021AD10012). （批准号:LGF21E030003,LTGC23B050004）
