Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries
Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries
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DOI：
10.1007/s12274-020-2993-4
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发表时间：
2020-08-25
期刊：
影响因子：
9.9
通讯作者：
Wang, Hailiang
中科院分区：
文献类型：
--
作者：
Hu, Yiran;Zhong, Yiren;Wang, Hailiang
Li1.5Al0.5Ge1.5（PO 4）（3）（LAGP）是一种固态电解质，具有高的离子电导率和空气稳定性，但与Li金属直接接触时，化学稳定性差，界面阻抗高。在这项工作中，我们开发了一种无机/聚合物杂化中间层，由Li双（三氟甲基磺酰基）酰亚胺/聚（碳酸亚乙烯酯）聚合物电解质和SiO（2）亚微球组成，以稳定Li/LAGP界面。聚合物组分赋予高离子电导率和低界面电阻，而无机组分赋予阻燃性和对已知的Li-LAGP副反应的物理屏障，一起使得能够在室温下稳定Li剥离/镀覆超过1，500小时。在两个电极处具有该中间层的情况下，还展示了具有稳定循环性能的与LiFePO（4）全电池平行的全固态Li。
Li1.5Al0.5Ge1.5(PO4)(3)(LAGP) is a solid-state electrolyte with high ionic conductivity and air stability but poor chemical stability and high interfacial impedance when directly contacted with Li metal. In this work, we develop an inorganic/polymer hybrid interlayer composed of Li bis(trifluoromethylsulfonyl)imide/poly(vinylene carbonate) polymer electrolyte and SiO(2)submicrospheres to stabilize the Li/LAGP interface. The polymeric component renders high ionic conductance and low interfacial resistance, whereas the inorganic component imparts flame retardancy and a physical barrier to the known Li-LAGP side reaction, together enabling stable Li stripping/plating for more than 1,500 h at room temperature. With this interlayer at both electrodes, all-solid-state Li parallel to LiFePO(4)full cells with stable cycling performance are also demonstrated.