Titanium dioxide (TiO2) and TiO2-based composite materials have been widely investigated in lithium-ion batteries (LIBs) owing to their small volume change and high safety during the cycling process. However, the low ionic and electrical conductivity of TiO2 nanomaterials leads to poor cycling performances for LIBs. Herein, we successfully synthesized three-dimensional (3D) mesoporous nanocube TiO2/reduced graphene oxide (TiO2/RGO) composites with a simple hydrothermal method without using any surfactants and high-temperature calcination. The as-prepared TiO2/RGO composites are characterized by x-ray diffraction, scanning electron microscopy, electron microscopy, and Brunauer–Emmett–Teller surface area. Benefiting from the RGO conductive substrates and 3D nanotube mesoporous structure, the as-prepared TiO2/RGO composites exhibit high specific capacities of ∼180 mA h g−1 at 1.2 C after 300 cycles as anode materials for lithium-ion batteries (LIBs).

中文翻译：

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具有增强锂存储性能的三维介孔纳米立方体TiO2/还原氧化石墨烯复合材料

二氧化钛（TiO2）和TiO2基复合材料由于其在循环过程中的体积变化小和安全性高，在锂离子电池（LIBs）中得到了广泛的研究。然而，TiO2 纳米材料的低离子电导率和电导率导致 LIB 的循环性能较差。在此，我们通过简单的水热法成功合成了三维（3D）介孔纳米立方体TiO2/还原氧化石墨烯（TiO2/RGO）复合材料，不使用任何表面活性剂和高温煅烧。所制备的 TiO2/RGO 复合材料通过 X 射线衍射、扫描电子显微镜、电子显微镜和 Brunauer-Emmett-Teller 表面积进行表征。受益于 RGO 导电基底和 3D 纳米管介孔结构，