Abstract Multilayered porous ultralong LiMn2O4 nanorods with a length of 30 μm, a diameter of 900 nm have been synthesized by using the ultralong γ-MnOOH as a self-sacrifice template, which is involved in the dissolution, regrowth and self-assembly process. Galvanostatic charge and discharge measurements show that the multilayered porous ultralong LiMn2O4 nanorods exhibit superior rate, specific capacity, long cycle stability and excellent high temperature performance. It delivers an initial charge and discharge specific capacity of 137.5 mAh g−1 and 134 mAh g−1 at 0.2C rate. Importantly, the multilayered porous ultralong nanorod structures are well preserved after prolonged charge and discharge cycling (1000 cycles) at a relatively high rate of 2C, 3C and 5C, demonstrating the excellent structural stability of the as-synthesized LiMn2O4, as is confirmed from scanning electron microscope images after several hundred cycles. Moreover, even at an extremely high rate of 50C, it still delivers a capacity of 75.4 mAh g−1. The long cycle life, excellent high temperature and superior rate, and specific capacity performance are attributed to its ultralong and one-dimensional porous nanostructure, respectively.

中文翻译：

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用于锂离子电池的多层多孔超长 LiMn2O4 纳米棒的优异容量、倍率、长循环寿命和高温性能

摘要 以超长γ-MnOOH为自牺牲模板，合成了长30 μm、直径900 nm的多层多孔超长LiMn2O4纳米棒，参与溶解、再生和自组装过程。恒电流充放电测量表明，多层多孔超长 LiMn2O4 纳米棒具有优异的倍率、比容量、长循环稳定性和优异的高温性能。它在 0.2C 倍率下提供 137.5 mAh g-1 和 134 mAh g-1 的初始充放电比容量。重要的是，多层多孔超长纳米棒结构在以相对较高的 2C、3C 和 5C 倍率长时间充放电循环（1000 次循环）后仍能得到很好的保存，证明合成的 LiMn2O4 具有优异的结构稳定性，数百次循环后的扫描电子显微镜图像证实了这一点。此外，即使在 50C 的极高倍率下，它仍可提供 75.4 mAh g-1 的容量。长循环寿命、优异的高温和优异的倍率以及比容量性能分别归因于其超长和一维多孔纳米结构。