3D structures have been widely used to suppress dendritic growth for stabilizing lithium metal anode. Unfortunately, it is hard to avoid lithium metal depositing on top of the framework, causing framework to lose its function. Here, we constructed a 3D periodic TiO₂ framework (3D‐TiO₂) on copper foil using polystyrene beads as template. The poor conductivity of TiO₂ makes metallic lithium to nucleate on copper surface under framework. Combining with 3D periodic channels for fast ion transport, lithium metal gradually filled the whole space of framework. No lithium metal appeared on surface of 3D‐TiO₂ electrode before filling up inner space. Meanwhile, large space provided by interconnected framework can ensure high loading of lithium, thereby suppressing the volume fluctuation during cycling. Additionally, batteries assembled by 3D‐TiO₂ electrode exhibited excellent rate capability, owning to the fast ion transport supplied by 3D periodic structure. We believe that the combination of high capacity and frequency response in lithium metal anode could meet the challenge of the currently available devices.

中文翻译：

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3D周期性离子传输通道可抑制朝向稳定锂金属阳极的顶部沉积

3D结构已被广泛用于抑制树枝状晶体生长以稳定锂金属阳极。不幸的是，很难避免锂金属沉积在框架的顶部，从而导致框架丧失其功能。在这里，我们以聚苯乙烯珠为模板在铜箔上构建了3D周期性TiO ₂骨架（3D-TiO ₂）。TiO _2的导电性差，使金属锂在骨架下的铜表面成核。结合3D周期性通道进行快速离子传输，锂金属逐渐填充了框架的整个空间。3D-TiO ₂表面没有锂金属出现电极在填满内部空间之前。同时，互连框架提供的大空间可确保锂的高负载，从而抑制循环期间的体积波动。此外，由3D-TiO ₂电极组装的电池具有出色的倍率性能，这归功于3D周期性结构提供的快速离子传输。我们认为，锂金属阳极中高容量和频率响应的结合可以应对当前可用器件的挑战。