材料科学
电解质
相间
电介质
化学工程
复合数
金属锂
阴极
枝晶(数学)
快离子导体
复合材料
纳米技术
电极
光电子学
物理化学
化学
工程类
生物
遗传学
数学
几何学
作者
Xufei An,Yang Liu,Ke Yang,Jinshuo Mi,Jiabin Ma,Danfeng Zhang,Likun Chen,Xiaotong Liu,Shaoke Guo,Yuhang Li,Yuetao Ma,Ming Liu,Yan‐Bing He,Feiyu Kang
标识
DOI:10.1002/adma.202311195
摘要
Abstract The fillers in composite solid‐state electrolyte are mainly responsible for the enhancement of the conduction of Li ions but barely regulate the formation of solid electrolyte interphase (SEI). Herein, a unique filler of dielectric NaNbO 3 for the poly(vinylidene fluoride) (PVDF)‐based polymer electrolyte, which is subjected to the exchange of Li + and Na + during cycling, is reported and the substituted Na + is engaged in the construction of a fluorinated Li/Na hybrid SEI with high Young's modulus, facilitating the fast transport of Li + at the interface at a high areal capacity and suppressing the Li dendrite growth. The dielectric NaNbO 3 also induces the generation of high‐dielectric β phase of PVDF to promote the dissociation of Li salt. The Li/Li symmetrical cell exhibits a long‐term dendrite‐free cycling over 600 h at a high areal capacity of 3 mA h cm −2 . The LiNi 0.8 Mn 0.1 Co 0.1 O 2 /Li solid‐state cells with NaNbO 3 stably cycle 2200 times at 2 C and that paired with high‐loading cathode (10 mg cm −2 ) can stably cycle for 150 times and exhibit excellent performances at −20 °C. This work provides a novel design principle of fillers undertaking interfacial engineering in composite solid‐state electrolytes for developing the safe and stable solid‐state lithium metal battery.
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