期刊
IONICS
卷 25, 期 12, 页码 5717-5723出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-03142-x
关键词
Li-ion batteries; Cathode material; Composites; 5LiFePO(4)center dot Li3V2 (PO4)(3); CMSs
Composite xLiFePO(4) (LF)center dot yLi(3)V(2) (PO4)(3) (VP) carbon microspheres (CMSs) (LFVPC) with different (x:y) molar ratios were investigated for lithium-ion batteries (LIBs), synthesized using a hydrothermal and carbon reduction method. The microstructures and properties of the LFVPC composites were characterized via scanning electron microscopy, transmission electron microscopy, and X-ray diffraction methods, respectively. The electrochemical behavior of the samples was analyzed by carrying out galvanostatic charge/discharge tests, electrochemical impedance spectroscopy, and cyclic voltammetry. The results show that the LFVPC composites have two phase structures with element doping. LFVPC-2 (molar ratio of 5:1), which was sintered at 650 degrees C for 18 h, exhibits a lower electrochemical resistance, weaker polarization, significantly improved reversibility and cycling life, and superior capacity retention of 97.1% after 25 cycles at 1 C and exhibits a high capacity of 114.1 (+/- 1.4) mAh g(-1), even at 5 C.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据