Abstract
Samples of LixNi0.1Co0.9O2 (0.5≤x≤1.0), prepared by electrochemical deintercalation from LiNi0.1Co0.9O2 , have been characterized by X-ray diffraction, electrical measurements and 7Li NMR spectroscopy. A good correlation is found between the electrochemical behaviour of the LixNi0.1Co0.9O2 electrode materials and their physical properties. During lithium deintercalation from LiNi0.1Co0.9O2 , the trivalent nickel ions are oxidized preferentially to trivalent cobalt ions. This leads to a reversible break in the potential–composition curve around the composition Li0.9Ni0.1Co0.9O2 . This change in the redox regime, which occurs without any structural transformation, has been confirmed by the evolution of the electrical conduction process and that of the 7Li NMR signal.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
