Lithium-ion battery based on LiCrTiO₄ (LCTO) is considered to be a promising anode material, as they provide higher safety and durability beyond than that of graphite electrode. However, the applications of this transformative technology demand improved inherent electrical conductivity of LCTO as well as a simple and rapid synthetic route. Here, LCTO with oxygen vacancies (OVs) is fabricated using high-pressure synthesis technology in only 40 min. The optimal synthesis pressure is 0.8 GPa (LCTO-0.8). The reversible capacity of LCTO-0.8 at 1C is 131 mA h g⁻¹ after 1000 cycles and the capacity retention is nearly 97%, and the reversible capacity of LCTO synthesized at atmospheric pressure (LCTO-P) is 85 mA h g⁻¹ under the same circumstances. Even at 5C, the reversible capacity is 110 mA h g⁻¹, which is 77% higher than LCTO-P. Furthermore, it is confirmed by theoretical calculations that the introduction of OVs has the occupation of electronic states at the Fermi level, which greatly enhances the intrinsic conductivity of LCTO. Specifically, the electronic conductivity has increased by two orders of magnitude compared with LCTO-P. Therefore, high-pressure synthesis technology endows LCTO with superior characteristics, providing a new avenue for industrialization.

中文翻译：

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高压快速合成具有氧空位的 LiCrTiO4 用于高倍率锂离子电池负极

基于 LiCrTiO ₄ (LCTO) 的锂离子电池被认为是一种很有前途的负极材料，因为它们提供了比石墨电极更高的安全性和耐用性。然而，这种变革性技术的应用需要提高 LCTO 的固有电导率以及简单快速的合成路线。在这里，具有氧空位 (OVs) 的 LCTO 使用高压合成技术仅需 40 分钟即可制造。最佳合成压力为 0.8 GPa (LCTO-0.8)。LCTO-0.8在1C下1000次循环后的可逆容量为131 mA hg ^-1，容量保持率接近97%，常压合成的LCTO（LCTO-P）可逆容量为85 mA hg ^-1在同样的情况下。即使在 5C 下，可逆容量为 110 mA hg ^-1，比 LCTO-P 高 77%。此外，理论计算证实OVs的引入占据了费米能级的电子态，大大提高了LCTO的本征电导率。具体来说，与LCTO-P相比，电子电导率增加了两个数量级。因此，高压合成技术赋予了LCTO优越的特性，为产业化提供了新的途径。