N-doped hollow urchin-like anatase TiO₂ spheres (HUTSs) with carbon coating ([email protected]) are prepared through a facile and scalable hydrothermal reaction followed by coating of polypyrrole and carbonization. The HUTS is composed of radially grown anatase nanorods and possesses an enhanced percentage of exposed {001} facets compared with P25 TiO₂ nanoparticles. After the carbon coating, the [email protected] retains the hollow nanostructure although covered with an N-doped carbon layer. As an anode for Li-ion batteries, the [email protected] delivers a higher capacity of 165.1 mAh g⁻¹ at 1C after 200 cycles and better rate capability (111.7 mAh g⁻¹ at 10C) than the HUTS. Further electrochemical studies reveal that the [email protected] has a better electrochemical reversibility, lower charge-transfer resistance, and higher Li-ion diffusion coefficient due to its unique nanosctructure including the hollow core, anatase phase of TiO₂ microspheres with high exposed {001} facets and the N-doped carbon layer, which facilitates mass transport and enhances electrical conductivity.

通过便捷且可扩展的水热反应，然后涂覆聚吡咯并进行碳化，可制备具有碳涂层（[电子邮件保护]）的N掺杂空心Urchin状锐钛矿型TiO ₂球（HUTS）。HUTS由径向生长的锐钛矿型纳米棒组成，与P25 TiO ₂纳米颗粒相比，其暴露的{001}面的百分含量提高。碳涂层后，[电子邮件保护的]保留了中空的纳米结构，尽管覆盖了N掺杂的碳层。作为锂离子电池的阳极，经过200次循环后，[电子邮件保护]在1C时可提供165.1 mAh g ^-1的更高容量，以及更好的倍率容量（111.7 mAh g ^-1在10°C时）。进一步的电化学研究表明，[电子邮件保护的]具有更好的电化学可逆性，较低的电荷转移电阻和较高的锂离子扩散系数，这是由于其独特的纳米结构，包括空心的，具有高暴露{001的TiO ₂微球的锐钛矿相。}刻面和N掺杂碳层，这有助于质量传输并增强电导率。