ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Spherical LiNi0.8Co0.2O2 powders with particle size of 8~10μm were prepared based oncontrolled crystallization, and coated with Al2O3 by Al(OH)3 sol, that was prepared from Al(NO3)3 andNaOH, at first time. SEM, XRD and surface element analysis showed that the nano-sized Al2O3 wascoated uniformly on the surface of LiNi0.8Co0.2O2 powder. At 25 °C, the initial discharge capacitydecreased from 160 to 149 mAh g-1 after coating of Al2O3. The initial discharge capacity decreased from168 to 163 mAh g-1 after coating of Al2O at 55 °C. After coating of Al2O3, the capacity retentionsincreased from 83.8% to 92.6% at the 50th cycle at 25°C, and from 36.3% to 90.8% at the 10th cycle at55°C. This paves effective way to improve the performance of LiNi0.8Co0.2O2 material for rechargeablelithium ion batteries
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.517.pdf
Permalink