scholarly journals Enhanced elevated-temperature performance of Al-doped LiMn2O4 as cathodes for lithium ion batteries

2017 ◽  
Author(s):  
Shiyou Li ◽  
KongLei Zhu ◽  
Songli Du
Keyword(s):  
Elevated Temperature ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Temperature Performance ◽  
Elevated Temperature Performance

Study on Elevated-Temperature Performance of LiCo0.02Cr0.02Mn1.96O4 by Surface Modification

2011 ◽  
Vol 415-417 ◽  
pp. 14-18
Author(s):  
Xing He Lu ◽  
Dong Han ◽  
Guang Qing Zhang ◽  
Nan Ma ◽  
Si Fei Liu
Keyword(s):  
Surface Modification ◽  
Elevated Temperature ◽  
Cathode Material ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycle Performance ◽  
X Ray Diffraction ◽  
Temperature Performance ◽  
Elevated Temperature Performance ◽  
Discharge Curves

The elevated-temperature performance of LiCo0.02Cr0.02Mn1.96O4cathode material, by SiO2-Al2O3surface modification, has been studied. The cathode material was been deal with SiO2-Al2O3, and then heated on certain temperature to get rid of organic material. The material structures that been modified (unmodified) were characterized by XRD, SEM and SpectraPlus. X-ray diffraction shows that all the samples have perfect spinel structure. The cycle stability of charge & discharge has been improved at 55°C. The results of the charge/discharge curves shows that the modified cathode materials have better performance than those unmodified, according to the inhibition of decline of reversible capacity of spinel LiCo0.02Cr0.02Mn1.96O4.Therefore, cycle performance has improved so obviously that 87.92% of the initial capacity were preserved respectively after 100 cycles. As cathode material of Lithium-ion battery, the modified spinel material is one of the most competitive substitutes for LiCoO2.

Sign in / Sign up

Export Citation Format

Share Document