CARBON-TREATED COMPLEX OXIDES AND METHOD FOR MAKING THE SAME
First Claim
1. A material C-AMXO4, composed of particles of a compound corresponding to the formula AMXO4 which have an olivine structure and which carry, on at least a portion of their surface, a film of carbon deposited by pyrolysis, the formula AMXO4 being such that:
- A represents Li, alone or partially replaced by at most 10% as atoms of Na or K;
M represents Fe(II), alone or partially replaced by at most 50% as atoms of one or more other metals chosen from Mn, Ni and Co and/or by at most 10% as atoms of one or more aliovalent or isovalent metals other than Mn, Ni or Co, and/or by at most 5% as atoms of Fe(III);
XO4 represents PO4, alone or partially replaced by at most 10 mol % of at least one group chosen from SO4 and SiO4; and
said material having a water content of less than 1000 ppm.
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Abstract
The invention relates to a process for the preparation of a carbon-treated complex oxide having a very low water content and to its use as cathode material.
The carbon-treated complex oxide is composed of particles of a compound AMXO4 having an olivine structure which carry, on at least a portion of their surface, a film of carbon deposited by pyrolysis. A represents Li, alone or partially replaced by at most 10% as atoms of Na or K. M represents Fe(II), alone or partially replaced by at most 50% as atoms of one or more other metals chosen from Mn, Ni and Co, and/or by at most 10% as atoms of one or more aliovalent or isovalent metals other than Mn, Ni or Co, and/or by at most 5% as atoms of Fe(III). X4 represents PO4, alone or partially replaced by at most 10 mol % of SO4 and SiO4. Said material has a water content <1000 ppm.
40 Citations
30 Claims
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1. A material C-AMXO4, composed of particles of a compound corresponding to the formula AMXO4 which have an olivine structure and which carry, on at least a portion of their surface, a film of carbon deposited by pyrolysis, the formula AMXO4 being such that:
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A represents Li, alone or partially replaced by at most 10% as atoms of Na or K; M represents Fe(II), alone or partially replaced by at most 50% as atoms of one or more other metals chosen from Mn, Ni and Co and/or by at most 10% as atoms of one or more aliovalent or isovalent metals other than Mn, Ni or Co, and/or by at most 5% as atoms of Fe(III); XO4 represents PO4, alone or partially replaced by at most 10 mol % of at least one group chosen from SO4 and SiO4; and said material having a water content of less than 1000 ppm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification