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首页> 外文期刊>Electrochimica Acta >Synthesis and electrochemical performance of Li_2FeSiO_4/carbon/carbon nano-tubes for lithium ion battery
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Synthesis and electrochemical performance of Li_2FeSiO_4/carbon/carbon nano-tubes for lithium ion battery

机译:锂离子电池用Li_2FeSiO_4 /碳/碳纳米管的合成及电化学性能

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摘要

Li_2FeSiO_4/carbon/carbon nano-tubes (Li_2FeSiO_4/C/CNTs) and Li_2FeSiO_4/carbon (Li_2FeSiO_4/C) composites were synthesized by a traditional solid-state reaction method and characterized comparatively by X-ray diffraction, scanning electron microscopy, BET surface area measurement, galvanostatic charge-discharge and AC impedance spectroscopy, respectively. The results revealed that the Li_2FeSiO_4/C/CNT composite exhibited much better rate performance in comparison with the Li_2FeSiO_4/C composite. At 0.2C, 5C and 10C, the former composite electrode delivered a discharge capacity of 142 mAhg~(-1), 95 mAh g~(-1), 80mAh g~(-1), respectively, and after 100 cycles at 1 C, the discharge capacity remained 95.1% of its initial value.
机译:采用传统的固相反应方法合成了Li_2FeSiO_4 /碳/碳纳米管(Li_2FeSiO_4 / C / CNTs)和Li_2FeSiO_4 /碳(Li_2FeSiO_4 / C)复合材料,并通过X射线衍射,扫描电子显微镜,BET表面进行了表征面积测量,恒电流充放电和交流阻抗谱。结果表明,与Li_2FeSiO_4 / C复合材料相比,Li_2FeSiO_4 / C / CNT复合材料具有更好的倍率性能。前者的复合电极在0.2C,5C和10C时的放电容量分别为142 mAhg〜(-1),95 mAh g〜(-1),80mAh g〜(-1),并在1次100次循环后放电C,放电容量保持其初始值的95.1%。

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