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JIANGDONG GUO1, YING YANG1, QIANLI MA1, XIANGTING DONG1,* , XINLU WANG1, JINXIAN WANG1, WENSHENG YU1,* , GUIXIA LIU1, TINGTING WANG1
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. of China
Co3O4 hollow nanofibers were successfully synthesized via a facile electrospinning followed by post-calcination process, CoO and Co2N hollow nanofibers were respectively obtained via reduction and nitridation of the prepared Co3O4 hollow nanofibers in the presence of NH3 atmosphere at 310 °C and 350 °C. The crystal structure, morphology and compositions of Co3O4, CoO and Co2N hollow nanofibers were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectrometry (EDS). Co3O4, CoO and Co2N hollow nanofibers were explored as the anode materials for Li-ion batteries. Co3O4 and CoO hollow nanofibers electrodes have high initial discharge capacity of 883 and 954 mAh·g-1, respectively, high coulombic efficiency and stable cycling performance (743 mAh·g-1 for Co3O4 and 731 mAh·g-1 for CoO after 220 cycles) at the current density of 100 mA·g-1. Co2N hollow nanofibers electrode displays outstanding long-term stability (554 mAh·g-1 at the 500th cycle with a current density of 100 mA·g-1), and excellent rate capability. The superior electrochemical performances are attributed to the unique one-dimensional hollow nanostructure of the materials. The prepared hollow nanofibers are promising anode materials for Li-ion batteries..
Electrospinning, Reduction, Nitridation, Hollow nanofibers, Li-ion batteries, Long-term stability.
Submitted at: May 18, 2017
Accepted at: June 7, 2018
JIANGDONG GUO, YING YANG, QIANLI MA, XIANGTING DONG, XINLU WANG, JINXIAN WANG, WENSHENG YU, GUIXIA LIU, TINGTING WANG, Novel strategy to achieve Co3O4, CoO and Co2N hollow nanofibers as advanced anode materials for Li-ion batteries, Journal of Optoelectronics and Advanced Materials Vol. 20, Iss. 5-6, pp. 326-336 (2018)
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