Ordered spinel LiNi₀.₅Mn₁.₅O₄ nanorods for high-rate lithium-ion batteries
2013
Yang, Jingang | Zhang, Xiaolong | Zhu, Zhiqiang | Cheng, Fangyi | Chen, Jun
We report on the synthesis of ordered spinel LiNi₀.₅Mn₁.₅O₄ nanorods (LNMO-NRs) and their application as high-rate cathode materials of lithium-ion batteries. Ordered spinel LNMO-NRs were prepared by a simple self-support template method followed by a solid-state reaction. The as prepared LNMO-NRs displayed uniform one dimensional (1D) nanostructure with the diameters of about 100nm and the lengths around 2–3μm. X-ray diffraction and Raman spectroscopy showed that the products existed in pure P4₃32 phase. When the as-prepared LNMO-NRs were applied as the cathode materials for lithium ion batteries, they exhibited a superior high-rate capability (135mAhg⁻¹ at 1C, 120mAhg⁻¹ at 20C) and a good cyclability (at 20C with a high retention of 90% after 80cycles). The durable high-rate capability was attributed to the one-dimensional nanostructure with the ordered phase that shows fast Li-intercalation kinetics and good structural stability.
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