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US 11,563,212 B2Granted
Sacrificial active material of a positive electrode for a lithium-ion electrochemical element
AssigneesSaft, Ensicaen, Unicaen, Centre National De La Recherche Scientifique
InventorsChristian Jordy, Melanie Freire, Valerie Pralong
Life of this patent
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Abstract
A sacrificial positive active material for a lithium-ion electrochemical element which is a compound of formula (Li2O)x (MnO2)y(MnO)z(MOa)t in which: x+y+z+t=1; 1−x−y≥0; 0.97≥x≥0.6; y≤0.45; x −0.17; y≥0; y+z>0; t≥0; 1≤a<3. M is selected from the group consisting of Fe, Co, Ni, B, Al, Ti, Si, V, Mo, Zr and a mixture thereof.
Claims23
Nanostructured compound of formula (Li2O)x (MnO2)y (MnO)z (MOa)t
- wherein
- x+y+z+t=1
- 1−x−y≥0
- 0.97≥x≥0.6
- y≤0.45·x−0.17
- y≥0
- y+z>0
- t≥0
- 1≤a<3
- M is selected from the group consisting of Fe, Co, Ni, B, Al, Ti, Si, V, Mo, Zr and a mixture thereof,
- wherein the nanostructured compound has an X-ray diffraction pattern in which a width at mid-height of a line at a 2-theta angle between 40° and 45° is greater than 1°, a wavelength used being the Kalpha wavelength of copper.
8 more elements
Dependencies are inferred from the claim text.