Electrospun CoSe@N-doped carbon nanofibers with highly capacitive Li storage

Authors

Jiandong Liu, Hunan University
Jiaojiao Liang, Hunan University, Hunan University of Technology
Caiyun Wang, University of WollongongFollow
Jianmin Ma, Hunan University

RIS ID

130733

Publication Details

Liu, J., Liang, J., Wang, C. & Ma, J. (2019). Electrospun CoSe@N-doped carbon nanofibers with highly capacitive Li storage. Journal of Energy Chemistry, 33 160-166.

Abstract

One-dimensional nano-structured materials have attracted attention due to its unique properties afforded such as the across-linked structures and large aspect ratios. In this work, one-dimensional CoSe@N-doped carbon nanofibers (CoSe@NC NFs) are successfully by combining the techniques of electrospinning and annealing. Selenium powder are directly dispersed in the polyacrylonitrile /N,N-Dimethylformamide (DMF) solution containing cobalt salt to form the product. The performance of these materials was investigated in Li-ion batteries after the annealing at different temperatures. The CoSe@NC nanofibers annealed at 550 °C (CoSe@NC-550) and displayed excellent storage properties, affording a high capacity of 796 mAh·g⁻¹at a current density of 1 A·g⁻¹for 100 cycles. Moreover, it is confirmed that the pseudocapacitive contribution of CoSe@NC-550 is up to 72.8% at the scan rate of 1 mV/s through the cyclic voltammetry analysis.