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首页> 外文期刊>Journal of industrial and engineering chemistry >Synthesis and electrochemical performance of transition metal-coated carbon nanofibers as anode materials for lithium secondary batteries
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Synthesis and electrochemical performance of transition metal-coated carbon nanofibers as anode materials for lithium secondary batteries

机译：过渡金属涂层碳纳米纤维作为锂二次电池阳极材料的合成与电化学性能

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In this study, transition metal coated carbon nanofibers (CNFs) were synthesized and applied as anode materials of Li secondary batteries. CNFs/Ni foam was immersed into 0.01 M transition metal solutions after growing CNFs on Ni foam via chemical vapor deposition (CVD) method. Transition metal coated CNFs/Ni foam was dried in an oven at 80 degrees C. Morphologies, compositions, and crystal quality of CNF-stransition metal composites were characterized by scanning electron microscopy (SEM), Raman spectroscopy (Raman), and X-ray photoelectron spectroscopy (XPS), respectively. Electrochemical characteristics of CNFs-transition metal composites as anodes of Li secondary batteries were investigated using a three-electrode cell. Transition metal/CNFs/Ni foam was directly employed as a working electrode without any binder. Lithium foil was used as both counter and reference electrodes while 1 M LiCIO4 was employed as the electrolyte after it was dissolved in a mixture of propylene carbonate:ethylene carbonate (PC:EC) at 1:1 volume ratio. Galvanostatic charge/discharge cycling and cyclic voltammetry measurements were taken at room temperature using a battery tester. In particular, the capacity of the synthesized CNFs-Fe was improved compared to that of CNFs. After 30 cycles, the capacity of CNFs-Fe was increased by 78%. Among four transition metals of Fe, Cu, Co and Ni coated on carbon nanofibers, the retention rate of CNFs-Fe was the highest at 41%. The initial capacity of CNFs-Fe with 670 mAhig was reduced to 275 mAh/g after 30 cycles. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：在该研究中，合成过渡金属涂覆的碳纳米纤维（CNF）作为Li二次电池的阳极材料。通过化学气相沉积（CVD）方法在Ni泡沫上生长CNFS后，将CNFS / Ni泡沫浸入0.01μm过渡金属溶液中。在80℃的烘箱中在烘箱中干燥过渡金属涂覆的CNFS / Ni泡沫。通过扫描电子显微镜（SEM），拉曼光谱（拉曼）和X射线，表征CNF-斜纹金属复合材料的形态，组合物和晶体质量。光电子体光谱（XPS）分别。 CNFS-过渡金属复合材料的电化学特性用三电极细胞研究了Li二次电池的阳极。过渡金属/ CNFS / Ni泡沫直接用作没有任何粘合剂的工作电极。使用锂箔作为计数器和基准电极，而在碳酸亚丙酯：乙烯酯（PC：EC）的混合物中溶解后，使用1M LiciO 4作为电解质。使用电池测试仪在室温下拍摄电流电荷/放电循环和循环伏安法测量。特别地，与CNFS相比，合成的CNFS-Fe的容量得到改善。 30次循环后，CNFS-Fe的能力增加了78％。在碳纳米纤维上的Fe，Cu，Co和Ni的四种过渡金属中，CNFS-Fe的保留率最高，41％。在30个循环后，具有670个Mahig的CNFS-Fe的初始容量将降至275mAh / g。 （c）2018年韩国工程和工程化学学会。 elsevier b.v出版。保留所有权利。

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