The development of fast rechargeable lithium ion batteries (LIBs) is highly dependent on the innovation of advanced high-power electrode materials. In this work, for the first time, we report a sacrificial NiO arrays template method for controllable synthesis of self-supported hierarchical porous Li₄Ti₅O₁₂/C (LTO/C) nanoflakes arrays, for use as fast rechargeable anodes for LIBs. The ultrathin (2–3 nm) carbon layer was uniformly coated on the LTO forming arrays architecture. The hierarchical porous LTO/C nanoflakes consisted of primary cross-linked nanoparticles of 50–100 nm and showed large porosity. Because of the enhanced electrical conductivity and accelerated ion transfer channels, the well-designed binder-free porous LTO/C nanoflakes arrays exhibited notable high-rate lithium ion storage performance with smaller polarization, better electrochemical reactivity, higher specific capacity (157 mAh g⁻¹ at the current density of 20C) and improved long-term cycling life (96.2% after 6000 cycles at 20 C), superior to the unmodified porous LTO arrays counterpart (126 mAh g⁻¹ at 20C and 88.0% after 6000 cycles at 20 C). Our work provides a new template for the construction of high-performance high-rate electrodes for electrochemical energy storage.

快速可充电锂离子电池（LIB）的开发高度依赖于先进的大功率电极材料的创新。在这项工作中，我们首次报告了一种可牺牲的NiO阵列模板方法，用于可控制的自支撑分层多孔Li ₄ Ti ₅ O _12的合成。/ C（LTO / C）纳米薄片阵列，用作LIB的快速可充电阳极。超薄（2-3 nm）碳层均匀地涂覆在LTO形成阵列结构上。分层的多孔LTO / C纳米薄片由50-100 nm的主要交联纳米颗粒组成，并显示出大孔隙率。因为增强的电导率和加速的离子转移通道中，精心设计的粘合剂-自由多孔LTO / C纳米片阵列表现出显着的高倍率锂离子蓄电性能具有较小偏振，更好的电化学反应性，更高的比容量（157毫安克^-在20C的电流密度下为¹）并改善了长期循环寿命（在20 C下6000次循环后为96.2％），优于未修饰的多孔LTO阵列同类产品（126 mAh g ^-1在20°C时为20％，在20°C下经过6000次循环后为88.0％。我们的工作为构建用于电化学储能的高性能高倍率电极提供了新模板。