Title :
Study on the capacity fading mechanism of lithium-ion battery
Author_Institution :
Dept. of Machinery, Weifang Univ., Weifang, China
Abstract :
The capacity fading mechanism of lithium-ion battery during the cycling process, using LiNi1/3Co1/3Mn1/3O4 as cathode material, was investigated by SEM, XRD, ICP, DSC. The results show that the reasons which lead to the capacity fading are: (1) the pulverization of the cathode powder, which enlarges the inner resistance from 10 mΩ to 28 mΩ during the cycling process. (2) the decomposition of the electrolyte, which lead to the increase of lithium element in the cathode and anode, in the cathode increasing from 5.349% to 6.632%, while in the anode increasing from 1.512% to 2.219% during the cycling process.
Keywords :
X-ray diffraction; differential scanning calorimetry; electrochemical electrodes; lithium; lithium compounds; nickel compounds; scanning electron microscopy; secondary cells; DSC; ICP; Li; LiNi0.33Co0.33Mn0.33O4; SEM; XRD; capacity fading mechanism; cathode material; cathode powder; cycling process; electrolyte decomposition; lithium element; lithium-ion battery; resistance 10 mohm to 28 mohm; Batteries; Cathodes; Fading; Iterative closest point algorithm; Lithium; Materials; X-ray scattering; capacity fading; lithium-ion battery; ternary cathode material;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2011 International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4244-8162-0
DOI :
10.1109/ICECENG.2011.6057060
