The self-healing feature of gallium (Ga) is unique, making Ga-based materials attract attention for their potential to solve the anode pulverization issue of lithium ion batteries. In this work, a hierarchical two-dimensional (2D) Ga2O3/C structure has been synthesized by a facile NaCl template method. Ga2O3 nanoparticles (3.8 nm) are uniformly embedded in 2D carbon nanosheets. The long horizontal length of the carbon nanosheets (10 μm) provides long-range electron conductivity, and the thin vertical thickness (75 nm) shortens the Li ion diffusion path. Benefited from the integrated 2D structure and the high electron conductivity, the obtained 2D Ga2O3/C nanosheets exhibit excellent overall performance, including high lithium storage capacity (1026 mAh g-1 at 0.5 A g-1), high rate capability (378 mAh g-1 at 10.0 A g-1), and high cyclability (500 cycles at 0.5 A g-1). The lithiation/delithiation mechanism of 2D Ga2O3/C has been further studied with combined electrochemical and ex situ X-ray diffraction methods.

中文翻译：

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二维Ga2O3 / C纳米片作为锂离子电池的耐用和高速率阳极材料。

镓（Ga）的自愈特性是独特的，这使得Ga基材料因其解决锂离子电池阳极粉碎问题的潜力而备受关注。在这项工作中，已经通过一种简便的NaCl模板方法合成了一个二维二维（2D）Ga2O3 / C结构。Ga2O3纳米颗粒（3.8 nm）均匀地嵌入2D碳纳米片中。碳纳米片的水平长度长（10μm）可提供长距离电子传导性，而垂直厚度薄（75 nm）则缩短了Li离子的扩散路径。得益于集成的2D结构和高电子电导率，获得的2D Ga2O3 / C纳米片表现出出色的总体性能，包括高锂存储容量（0.5 A g-1时为1026 mAh g-1），高倍率容量（378 mAh g） -1在10.0 A g-1）下，和高可循环性（0.5 A g-1时500个循环）。结合电化学和非原位X射线衍射方法，对2D Ga2O3 / C的锂化/脱锂机理进行了进一步研究。