The fabrication of nano-sized cobalt ferrite and its application in lithium-oxygen batteries
CUI Lei-jie
WANG Xiang-jun
DUAN Meng-ya
Li Peng
CHI Yong-qing
Abstract：In this work,nano-sized CoFe2O4was fabricated via a simple hydrothermal process and calcined at various temperatures,such as 350℃,450℃,550℃,650℃,750℃.The structure of as-prepared CoFe2O4was characterized by the Scan Electron Microscope (SEM),X-ray Diffraction (XRD),Fourier Transform Infrared Spectroscopy (FT-IR)and nitrogen adsorption method (BET).The performance of CoFe2O4nano-materials as the catalyst in the lithium air batteries were investigated with the method of galvanostatic charge-discharge test.It exhibited that the structure of CoFe2O4was the spinel type.The nano-sized CoFe2O4samples were empolyed as the catalyst of the anode material,Ketj en carbon in the lithium air batteries.The electrochemical proformances of the lithium air batteries were anylysed in the voltage window of 2.3V~4.5 V. The battery with CoFe2O4roasted at 650℃ has the largest initial discharge capacity of 2943 mAh/g(electrode),at the current density of 0.02 mA·cm-2,which is 6.7 times higher than that of Ketj en carbon without any catalysts.Futhermore,the over-potential of the battery with CoFe2O4roasted at 650℃ is 0.95 V,which is 0.37 V higher compared to the pure Ketjen carbon.
Keywords：Nano-sized cobalt ferriteLithium air batteriesInitial discharge capacityOver-poten-tial
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 72-77 )