Composite solid electrolytes (CSEs) consisting of polymers and fast ionic conductors are considered a promising strategy for realizing safe rechargeable batteries with high energy density. However, randomly distributed fast ionic conductor fillers in the polymer matrix result in tortuous and discontinuous ion channels, which severely constrains the ion transport capacity and restricts its practical application. Here, CSEs with highly loaded vertical ion transport channels are fabricated by magnetically manipulating the alignment of Li_0.35La_0.55TiO₃ nanowires. The construction of densely packed, vertically aligned ion transport channels can effectively enhance the ion transport capacity of the electrolyte, thereby significantly increasing ionic conductivity. At room temperature (RT), the presented CSE exhibits a remarkable ionic conductivity of up to 2.5 × 10⁻⁴ S cm⁻¹. The assembled LiFePO₄/Li cell delivers high capacities of 118 mAh g⁻¹ at 5 C at 60 °C and a RT capacity of 115 mAh g⁻¹ can be achieved at a charging rate of 0.5 C. This work paves an encouraging avenue for further development of advanced CSEs that favor lithium metal batteries with high energy density and electrochemical performance.

中文翻译：

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用于全固态锂金属电池的具有垂直离子传输通道的复合固态电解质


由聚合物和快速离子导体组成的复合固体电解质 （CSE） 被认为是实现高能量密度的安全可充电电池的一种有前途的策略。然而，聚合物基质中随机分布的快速离子导体填料导致离子通道曲折且不连续，这严重限制了离子传输能力并限制了其实际应用。在这里，通过磁操纵 Li_0.35La_0.55TiO₃ 纳米线的对准来制造具有高负载垂直离子传输通道的 CSE。构建密集排列、垂直排列的离子传输通道可以有效增强电解质的离子传输能力，从而显著提高离子电导率。在室温 （RT） 下，所提出的 CSE 表现出高达 2.5 × ^10-4 S ^cm-1 的显着离子电导率。组装好的 LiFePO₄/Li 电池在 5 C、60 °C 下提供 118 mAh ^g-1 的高容量，在 115 C 的充电速率下可实现 0.5 mAh ^g-1 的 RT 容量。这项工作为进一步开发先进的 CSE 铺平了一条令人鼓舞的途径，这些 CSE 有利于具有高能量密度和电化学性能的锂金属电池。