No single polymer or liquid electrolyte has a large enough energy gap between the empty and occupied electronic states for both dendrite‐free plating of a lithium‐metal anode and a Li⁺ extraction from an oxide host cathode without electrolyte oxidation in a high‐voltage cell during the charge process. Therefore, a double‐layer polymer electrolyte is investigated, in which one polymer provides dendrite‐free plating of a Li‐metal anode and the other allows a Li⁺ extraction from an oxide host cathode without oxidation of the electrolyte in a 4 V cell over a stable charge/discharge cycling at 65 °C; a poly(ethylene oxide) polymer contacts the lithium‐metal anode and a poly(N‐methyl‐malonic amide) contacts the cathode. All interfaces of the flexible, plastic electrolyte remain stable with no visible reduction of the Li⁺ conductivity on crossing the polymer/polymer interface.

中文翻译：

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适用于高压全固态可充电电池的双层聚合物电解质

没有任何一种聚合物或液体电解质在空态和占据电子态之间都没有足够大的能隙，既无法进行锂金属阳极的无枝晶电镀，又无需在高压电池中进行电解质氧化即可从氧化物主阴极提取Li ⁺在充电过程中。因此，研究了一种双层聚合物电解质，其中一种聚合物提供锂金属阳极的无枝晶镀层，另一种聚合物允许从氧化物主阴极提取Li ⁺而不会使4 V电池中的电解质氧化在65°C下稳定的充电/放电循环；聚（环氧乙烷）聚合物与锂金属阳极接触，而聚（N甲基丙二酰胺）接触阴极。柔性塑料电解质的所有界面保持稳定，并且在穿过聚合物/聚合物界面时，Li ⁺电导率没有明显降低。