Spinel-layered composites of Li_1.5MnTiO_4+δ were studied for their use as high-energy, low-cost, and environmentally benign cathode materials. The bulk particles showed an attractive specific capacity of up to 250 mAh g⁻¹ at C/10. To improve the performance of this cathode at a high C-rate, a spinel-layered Li_1.5MnTiO_4+δ nanorod was successfully synthesized using a β-MnO₂ nanorod template. The nanorod, which had an average diameter of 200 nm and a length of 1 μm, showed specific capacity as high as the bulk particle at C/10. However, owing to a one-dimensional nanostructure with a large effective contact area for Li⁺ diffusion, the nanorod sample exhibited enhanced capacities 11% (170 mAh g⁻¹) and 167% higher (80 mAh g⁻¹) at 1C and 10C rates, respectively, compared to the bulk particles. Moreover, both samples showed good cycle stability and capacity retention of over 85% after 100 cycles at 1C.

中文翻译：

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模板参与的尖晶石层Li1.5MnTiO4 +δ纳米棒作为锂离子电池正极材料的模板合成

研究了Li _1.5 MnTiO _{4 +δ的}尖晶石层复合材料作为高能量，低成本和环境友好的阴极材料的用途。块状颗粒在C / 10下显示出高达250mAh g ^-1的吸引人的比容量。为了改善这种阴极的性能在高C-速率，尖晶石层状Li _1.5 MnTiO _{4 +δ}纳米棒是使用β-MnO的成功合成₂纳米棒的模板。纳米棒的平均直径为200 nm，长度为1μm，在C / 10时显示的比容与块状颗粒一样高。但是，由于一维纳米结构具有较大的Li ⁺有效接触面积与散装颗粒相比，在扩散过程中，纳米棒样品在1C和10C的速率下分别显示出增强的容量11％（170 mAh g ^-1）和167％（80 mAh g ^-1）。此外，两个样品均显示出良好的循环稳定性，并在1C下进行100次循环后容量保持率超过85％。