材料科学
金属锂
复合数
锂(药物)
电解质
电压
金属
聚合物
聚合物电解质
复合材料
纳米技术
电极
电气工程
冶金
离子电导率
工程类
内分泌学
物理化学
化学
医学
作者
Yan Chai,De Ning,Dong Zhou,Jiansheng Gao,Jialun Ni,Gaoyuan Zhang,Rui Gao,Wei Wu,Jun Wang,Yongli Li
出处
期刊:Nano Energy
[Elsevier BV]
日期:2024-08-23
卷期号:130: 110160-110160
被引量:56
标识
DOI:10.1016/j.nanoen.2024.110160
摘要
The primary obstacle hindering the application of composite solid electrolytes lies in the varying demands posed by the Li metal anode and the cathode, which needs to be capable of suppressing dendrite growth and resisting high voltage simultaneously. In this work, a new asymmetric composite solid-state electrolyte prepared via electrospinning and in-situ polymerization is proposed to address these shortcomings. In this bilayer architecture, polyacrylonitrile (PAN) layer of high-voltage tolerance, polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) layer of robust mechanical strength and good compatibility towards Li-anode are constructed, and metal-organic-frameworks (MOFs) are pre-embedded within both layers. The unique design provides a wide electrochemical stability window meanwhile ensures uniform lithium deposition. Remarkably, it exhibits a superior lithium utilization of 41 mAh cm −2 using a lean polymer electrolyte precursor and a high critical current density of 2.2 mA cm −2 with a thickness of 40 μm. Beneficial from the formation of a self-adjustable gradient solid electrolyte interphase in the Li/PVDF-HFP interface, the asymmetric electrolyte endows Li||Li and Li||NCM811 cells with excellent cycling stability. Moreover, the solid-state pouch cell exhibits reliable operation under extreme conditions. This work provides inspiration for the design and fabrication of composite solid electrolytes for next-generation high-voltage Li metal batteries .
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