Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China.
Nano Lett. 2014 Jun 11;14(6):3539-43. doi: 10.1021/nl501152f. Epub 2014 May 28.
FePO4 nanospheres are synthesized successfully through a simple chemically induced precipitation method. The nanospheres present a mesoporous amorphous structure. Electrochemical experiments show that the FePO4/C electrode demonstrates a high initial discharging capacity of 151 mAh g(-1) at 20 mA g(-1), stable cyclablilty (94% capacity retention ratio over 160 cycles), as well as high rate capability (44 mAh g(-1) at 1000 mA g(-1)) for Na-ion storage. The superior electrochemical performance of the FePO4/C nanocomposite is due to its particular mesoporous amorphous structure and close contact with the carbon framework, which significantly improve the ionic and electronic transport and intercalation kinetics of Na ions.
通过简单的化学诱导沉淀法成功合成了 FePO4 纳米球。纳米球呈现出介孔无定形结构。电化学实验表明，FePO4/C 电极在 20 mA g-1 时具有 151 mAh g-1 的高初始放电容量，稳定的循环性能（160 次循环后容量保持率为 94%），以及高倍率性能（在 1000 mA g-1 时为 44 mAh g-1）用于钠离子存储。FePO4/C 纳米复合材料具有优异的电化学性能，这是由于其特殊的介孔无定形结构和与碳骨架的紧密接触，这显著提高了钠离子的离子和电子传输以及嵌入动力学。
