Exploring electrode materials with a high volumetric energy density and high rate capability remains of a great challenge for nanosized-Li₄Ti₅O₁₂ (LTO) batteries. Here, hierarchical porous Ti³⁺-C-N-Br co-doped LTO (LTO_CPB-CC) is synthesized using carboxyl-grafted nanocarbon (CC) and cetylpyridinium bromide (CPB) as combined structure-directing agents. Ti⁴⁺-O-CPB/Li⁺-CC is designed as a new molecular chelate, in which CPB and CC promote the uniform mixing of Li⁺ and Ti⁴⁺ and control the morphology of TiO₂ and the final product. The defects (oxygen vacancies and ion dopants) formed during the annealing process increase the electron/hole concentration and reduce the band gap, both of which enhance the n-type electron modification of LTO. As-prepared LTO_CPB-CC has a large specific surface area and high tap density, as well as a high electronic conductivity (2.84 × 10⁻⁴ S cm⁻¹) and ionic conductivity (3.82 × 10⁻¹² cm² s⁻¹), which are responsible for its excellent rate capability (157.7 mA h g⁻¹ at 20 C) and stable long-term cycling performance (0.008% fade per cycle after 1000 cycles at 20 C).

对于纳米Li ₄ Ti ₅ O ₁₂（LTO）电池而言，探索具有高体积能量密度和高倍率能力的电极材料仍然是一个巨大的挑战。在此，使用羧基接枝的纳米碳（CC）和十六烷基溴化吡啶鎓（CPB）作为组合结构导向剂，合成了分层多孔Ti ³⁺ -CN-Br共掺杂的LTO（LTO _CPB-CC）。Ti ⁴⁺ -O-CPB / Li ⁺ -CC被设计为一种新型的分子螯合物，其中CPB和CC促进Li ⁺和Ti ⁴⁺的均匀混合并控制TiO ₂的形貌以及最终产品。在退火过程中形成的缺陷（氧空位和离子掺杂剂）增加了电子/空穴的浓度并减小了带隙，这两者都增强了LTO的n型电子修饰。所制备的LTO _CPB-CC具有大的比表面积和高的振实密度，以及高的电子电导率（2.84×10 ^-4  S cm ^-1）和离子电导率（3.82×10 ^-12  cm ²  s ^-1），这归因于其出色的倍率能力（20 C下为157.7 mA hg ^-1）和稳定的长期循环性能（20 C下1000次循环后每循环0.008％衰减）。