Effects of aluminum on the structural and electrochemical properties of LiNiO2
Language
en
Article de revue
This item was published in
Journal of Power Sources. 2003, vol. 115, n° 2, p. 305-314
Elsevier
English Abstract
LiNi1−yAlyO2 (0.10≤y≤0.50) compounds have been synthesized by a coprecipitation method. The characterization of the samples by X-ray and neutron diffraction, associated with Rietveld refinement analysis, has shown that for ...Read more >
LiNi1−yAlyO2 (0.10≤y≤0.50) compounds have been synthesized by a coprecipitation method. The characterization of the samples by X-ray and neutron diffraction, associated with Rietveld refinement analysis, has shown that for all materials, about 5% extra-nickel ions are present in the interslab space. Charge−discharge cycling of LiNi1−yAlyO2 as positive electrode material in lithium cells has shown that aluminum substitution suppresses all the phase transitions observed for the LiNiO2 system. Good cycling stability was observed, but the capacity decreases from 125 to 100 mAh/g by increasing the aluminum amount from 10 to 25% (3–4.15 V range; C/20 rate).Read less <
English Keywords
Intercalation
Lithium battery
LiNiO2
Aluminum substitution
Diffraction
Origin
Hal imported