材料科学
阳极
电解质
电化学
锂(药物)
阴极
金属锂
化学工程
金属
枝晶(数学)
相间
纳米技术
电极
物理化学
化学
冶金
内分泌学
工程类
生物
遗传学
医学
数学
几何学
作者
Tao Liu,Lin Zhang,Yuanyuan Li,Xinran Zhang,Guoqing Zhao,Shengnan Zhang,Yanwei Ma,Kangrong Lai,Jianwei Li,Lijie Ci
出处
期刊:Small
[Wiley]
日期:2023-12-06
标识
DOI:10.1002/smll.202307260
摘要
All-solid lithium (Li) metal batteries (ASSLBs) with sulfide-based solid electrolyte (SEs) films exhibit excellent electrochemical performance, rendering them capable of satisfying the growing demand for energy storage systems. However, challenges persist in the application of SEs film owing to their reactivity with Li metal and uncontrolled formation of lithium dendrites. In this study, iodine-doped poly(vinylidenefluoride-hexafluoropropylene) (PVDF-HFP) as an interlayer (PHI) to establish a stable interphase between Li metal and Li6 PS5 Cl (LPSCl) films is investigated. The release of I ions and PVDF-HFP produces LiI and LiF, effectively suppressing lithium dendrite growth. Density functional theory calculations show that the synthesized interlayer layer exhibits high interfacial energy. Results show that the PHI@Li/LPSCl film/PHI@Li symmetrical cells can cycle for more than 650 h at 0.1 mA cm-2 . The PHI@Li/LPSCl film/NCM622 cell exhibits a distinct enhancement in capacity retention of ≈26% when using LiNi0.6 Mn0.2 Co0.2 O2 (NCM622) as the cathode, compared to pristine Li metal as the anode. This study presents a feasible method for producing next-generation dendrite-free SEs films, promoting their practical use in ASSLBs.
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