Abstract Cr3+-doped Li4Ti5O12 (LTO) was fabricated by spray drying followed by a solid-state reaction. The crystal structure and morphology of the sample was tested using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The experimental results show that Cr3+-doped LTO not only significantly improved the discharge specific capacity but also maintained the original 1.55-V discharge platform. During the process of discharge–charge, Cr3+-doped LTO showed a long discharge plateau (91.4% of the entire discharge process) at 1.55 V and an ultra-high initial discharge specific capacity of 240.6 mAh g−1 at 0.1 °C. Furthermore, it can maintain 144.7 mAh g−1 at 5.0 °C after 200cycles, which is 92% of its initial discharge capacity.

中文翻译：

---

1.55 V下Cr3+掺杂Li4Ti5O12的超高比容量作为锂离子电池负极材料

摘要 Cr3+掺杂的Li4Ti5O12 (LTO)是通过喷雾干燥和固相反应制备的。使用X射线衍射（XRD）和扫描电子显微镜（SEM）测试样品的晶体结构和形貌。实验结果表明，Cr3+掺杂的LTO不仅显着提高了放电比容量，而且保持了原来的1.55-V放电平台。在放电-充电过程中，Cr3+掺杂的LTO在1.55 V时表现出较长的放电平台（整个放电过程的91.4%），在0.1°C时具有240.6 mAh g-1的超高初始放电比容量。此外，它在 200 次循环后可以在 5.0°C 下保持 144.7 mAh g-1，这是其初始放电容量的 92%。