Synthesis and thermal decomposition
kinetics of LiNiO2
kinetics of LiNiO2
(School of Materials and Metallurgy,Northeastern University,
Shenyang 110004,China)
Shenyang 110004,China)
Abstract: A layered LiNiO2 with high crystallinity was synthesized by sintering the finely prepared mixture of lithium hydroxide and nickel hydroxide in the oxygen atmosphere. The electro-chemical properties of LiNiO2 show that it has a reversible capacity of more than 168mA·h·g-1.It was found that with increasing temperature,LiNiO2 decomposed in air followed with three reaction stages, the apparent activation energies were 747.18±1.0kJ·mol-1,932.46±1.0kJ·mol-1 and 1126.97 ±1.0kJ·mol-1 respectively,and the kinetic equations of the three reaction stages were obtained.
Key words: lithiumion batteries;LiNiO2;electrochemistry;decomposition;kinetics