Title :
The performance of LiMn2O4/graphite battery after storing at high temperature
Author :
Yunjian, Liu ; Xinhai, Li ; Huajun, Guo
Author_Institution :
Sch. of Metall. Sci. & Eng., Central South Univ., Changsha
Abstract :
Spinel LiMn2O4 was synthesized by a solid-state method. 204468-size battery was fabricated and stored at high temperature. Structure and morphology of the LiMn2O4 cathode were observed by XRD and SEM technique, respectively. EDS was used to analyze the surface component of carbon anode. The discharge capacity fading is increasing with the time, but the cyclic performance is improved after storing. The LiMn2O4 retained its structure. But the intensity of all LiMn2O4 diffraction peaks is weakened. The carbon also retained its structure. But the Mn is detected from the carbon electrode when the battery is stored for 96 h. Cyclic voltammogram curves results show that the resistance and polarization of LiMn2O4/electrolyte is increased after storage.
Keywords :
X-ray chemical analysis; X-ray diffraction; electrochemical electrodes; electrolytes; graphite; lithium compounds; scanning electron microscopy; secondary cells; surface structure; voltammetry (chemical analysis); EDS; LiMn2O4-C; SEM technique; XRD technique; carbon anode; cathode morphology; cathode structure; cyclic voltammogram curves; discharge capacity fading; electrolyte; large-size battery fabrication; solid-state method; spinel synthesis; storage battery; surface component; time 96 h; Anodes; Batteries; Cathodes; Diffraction; Fading; Solid state circuits; Surface discharges; Surface morphology; Temperature; X-ray scattering; EDS; LiMn2O4; electrochemical performance; store; structure change;
Conference_Titel :
Vehicle Power and Propulsion Conference, 2008. VPPC '08. IEEE
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-1848-0
Electronic_ISBN :
978-1-4244-1849-7
DOI :
10.1109/VPPC.2008.4677562
