PROCESS FOR THE PREPARATION OF CRYSTALLINE LITHIUM-, VANADIUM-AND PHOSPHATE-COMPRISING MATERIALS
First Claim
1. A process for the preparation of compounds of general formula (I)
Lia-bM1bV2-cM2c(PO4)x
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(I)wherein M1, M2, a, b, c and x have the following meanings;
M1;
Na, K, Rb and/or Cs,M2;
Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg and/or Sc,a;
1.5-4.5,b;
0-0.6,c;
0-1.98 andx;
number to equalize the charge of Li and V, and M1 and/or M2, if present,wherein a−
b is >
0,comprising(A) providing an essentially aqueous mixture comprising at least one lithium-containing compound, at least one vanadium-containing compound in which vanadium has the oxidation state +5 and/or +4, and at least one M1-containing compound, if present, and/or at least one M2-containing compound, if present, and at least one reducing agent which is oxidized to at least one compound comprising at least one phosphorous atom in oxidation state +5,(B) drying the mixture provided in (A), in order to obtain a solid compound and(C) calcining the solid compound obtained from (B) at a temperature of 300 to 950°
C.
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Accused Products
Abstract
The present invention relates to a process for the preparation of compounds of general formula (I) Lia-bM1bV2-cM2c(PO4)x (I) with M1: Na, K, Rb and/or Cs, M2: Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg and/or Sc, a: 1.5-4.5, b: 0-0.6, c: 0-1.98 and x: number to equalize the charge of Li and V and M1 and/or M2, if present, wherein a−b is >0, by providing an essentially aqueous mixture comprising at least one lithium-comprising compound, at least one vanadium-comprising compound in which vanadium has the oxidation state +5 and/or +4, and at least one M1-comprising compound, if present, and/or at least one M2-comprising compound, if present, and at least one reducing agent which is oxidized to at least one compound comprising at least one phosphorous atom in oxidation state +5, drying and calcining.
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Citations
14 Claims
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1. A process for the preparation of compounds of general formula (I)
Lia-bM1bV2-cM2c(PO4)x-
(I)wherein M1, M2, a, b, c and x have the following meanings; M1;
Na, K, Rb and/or Cs,M2;
Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg and/or Sc,a;
1.5-4.5,b;
0-0.6,c;
0-1.98 andx;
number to equalize the charge of Li and V, and M1 and/or M2, if present,wherein a−
b is >
0,comprising (A) providing an essentially aqueous mixture comprising at least one lithium-containing compound, at least one vanadium-containing compound in which vanadium has the oxidation state +5 and/or +4, and at least one M1-containing compound, if present, and/or at least one M2-containing compound, if present, and at least one reducing agent which is oxidized to at least one compound comprising at least one phosphorous atom in oxidation state +5, (B) drying the mixture provided in (A), in order to obtain a solid compound and (C) calcining the solid compound obtained from (B) at a temperature of 300 to 950°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for the preparation of a mixture comprising at least one compound according to general formula (I)
Lia-bM1bV2-cM2c(PO4)x-
(I)wherein M1, M2, a, b, c and x have the following meanings; M1;
Na, K, Rb and/or Cs,M2;
Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg and/or Sc,a;
1.5-4.5,b;
0-0.6,c;
0-1.98 andx;
number to equalize the charge of Li and V, and M1 and/or M2, if present,wherein a−
b is >
0,and at least one electrically conducting material comprising (D) providing an essentially aqueous mixture comprising at least one electrically conducting material, at least one lithium-containing compound, at least one vanadium-containing compound in which vanadium has the oxidation state +5 and/or +4, and at least one M1-containing compound, if present, and/or at least one M2-containing compound, if present, and at least one reducing agent which is oxidized to at least one compound comprising at least one phosphorous atom in oxidation state +5, (E) drying the mixture provided in (D), in order to obtain a solid compound and (F) calcining the solid compound obtained from (E) at a temperature of 300 to 950°
C. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification