Study on the annealing phase transformation mechanism and electrochemical properties of carbon submicron fibers loaded with cobalt
Peilong Xu, Qinghui Yuan, Wendong Ji, Ruitao Yu, Fengyun Wang, Ningbo Huo
Abstract
Heterogeneous carbon submicron fibers loaded with Co 3 O 4 /Co and elemental cobalt were prepared by electrospinning and annealing processes. The phase transformation mechanism of Co 3 O 4 and elemental cobalt in heterogeneous submicron fibers at different annealing temperatures was studied. The electrochemical properties of carbon submicron fiber self-supported electrode materials loaded with Co 3 O 4 /Co and elemental cobalt were investigated. The experimental results show that the submicron fibers loaded with Co 3 O 4 /Co have better electrochemical performance because Co 3 O 4 has large capacitance, the improved electro conductibility of cobalt metal, and the cellular structure of carbon submicron fibers, which provide sufficient ion transport channels while alleviating the changes in the structure and volume of Co 3 O 4 during the cycle.