Random appearance of micro short circuits and voltage noise is observed, until now, on initial cycles of solid polymer electrolyte high voltage cathode cells with lithium metal anodes. However, this phenomenon also takes place in lower operation voltages such as those in LiFePO₄ cathode cells. Approaching the direct/indirect effect of the cathode, the polymer electrolyte, and the anode parts on this initial dendritic bridging between the electrodes separately, a systematic study is carried out toward determining potential causes of voltage noise and ways of prevention. Electrolytes based on the blend of PMMA–PEO show that relying only on the viscoelastic nature cannot prevent the appearance of voltage noise. Liquid polymers are used for the wetting of the cathode active material that lead to a complete pore infiltration. Having ensured the optimization of the interfacial area between the solid electrolyte and the cathode, studies along the directions of the lithium surface pretreatment and polymer ionic conductivity are examined as a means of dendrite growth suppression and cell cycling capabilities improvement, leading to the observation that methylated PEO chains work in favor of both of these directions.

中文翻译：

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旨在消除锂金属电池中粘弹性聚（甲基丙烯酸甲酯）-聚（环氧乙烷）聚合物共混电解质电压噪声的系统研究

到目前为止，在具有锂金属阳极的固体聚合物电解质高压阴极电池的初始循环中观察到微短路和电压噪声的随机出现。然而，这种现象也会发生在较低的工作电压下，例如LiFePO ₄阴极电池。分别探讨阴极、聚合物电解质和阳极部件对电极之间初始树枝状桥接的直接/间接影响，进行了系统研究，以确定电压噪声的潜在原因和预防方法。基于 PMMA-PEO 混合物的电解质表明，仅依靠粘弹性性质无法防止电压噪声的出现。液体聚合物用于润湿正极活性材料，从而实现完全的孔隙渗透。在确保固体电解质和正极之间界面面积的优化的基础上，沿着锂表面预处理和聚合物离子电导率的方向进行研究，作为抑制枝晶生长和提高电池循环能力的手段，