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Mn-doped LiFePO4/C Composite with Excellent High-Rate Performance as Lithium Ion Batteries Cathode

机译:Mn-Doped Lifepo4 / C复合材料具有优异的高速性能作为锂离子电池阴极

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Nano-rod Mn-doped carbon coating LiFePO4 composites have been synthesized by a samplesolvothermal process coupled with calcination, which shows an excellent performance at high ratecondition. The morphology and microstructure of the composites were evidenced by scanning electronmicroscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). Theelectrochemical properties were evaluated by constant current charge/discharge test. Mn-dopingmagnified the interplanar spacing, providing a smoother aisle for ionic transport, it is beneficial toimprove electrochemical properties at high rate. The stability was enhanced as well combined withcarbon coating. In electrochemical measurement of the specific charge capacity, rate capacity andcycling stability, the obtained composite rod-like materials offer remarkably promising results forapplication, the initial discharge capacity is 160 mAh·g-1at 0.2 C and 120 mAh·g-1at 10 C, the capacityretention ratio is 94% at 0.2 C and 93% at 10 C after 50 charge-discharge cycles.
机译:纳米棒MN掺杂的碳涂层Lifepo4复合材料已经通过与煅烧的样品溶解剂合成,其在高数的高度下显示出优异的性能。通过扫描电子镜(SEM),X射线衍射(XRD)和透射电子显微镜(TEM)来证明复合材料的形态和微观结构。通过恒定电流充电/放电试验评估电化学性质。 Mn-DopingMagnified平板环形间距,为离子运输提供更光滑的过道,它具有高速率的有益的避免电化学性质。与碳涂层合并的稳定性增强。在电化学测量特定充电容量,速率容量和循环稳定性的情况下,所获得的复合杆状材料提供显着承诺的结果,采用显着的效果,初始放电容量为160 mAh·g-1at 0.2c和120mah·g-1at 10 c,在50次充电 - 放电循环后,载体谱比在0.2℃下为0.2℃和93%。

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