Abstract:
The present invention is directed towards a process for making a lithiated transition metal oxide, said process comprising the following steps: (a) providing a precursor selected from mixed oxides, hydroxides, oxyhydroxides, and carbonates of nickel and at least one transition metal selected from manganese and cobalt, wherein at least 45 mole-% of the cations of the precursor are Ni cations, (b) mixing said precursor with at least one lithium salt selected from LiOH, Li2O, Li2CO3, and LiNO3, thereby obtaining a mixture, (c) adding at least one phosphorus compound of general formula (I) XyH3−yPO4 (I) wherein X is selected from NH4 and Li, y is 1 or 2, to the mixture obtained in step (b), wherein steps (b) and (c) may be performed consecutively or simultaneously, treating the mixture so obtained at a temperature in the range of from 650 to 950° C.
Abstract:
The invention relates to spherical particles, containing (A) at least one mixed transition metal hydroxide or mixed transition metal carbonate comprising at least 3 different transition metals selected from nickel, cobalt, manganese, iron, chromium and vanadium, (B) at least one fluoride, oxide or hydroxide of Ba, Al, Zr or Ti, wherein the transition metals in transition metal hydroxide (A) or transition metal carbonate (A) are predominantly present in oxidation stage +2, wherein at least 75% of fluoride (B) or oxide (B) or hydroxide (B) is present in the form of domains in an outer shell of the spherical particles and are at least 90% covered by transition metal hydroxide (A) and/or transition metal carbonate (A).
Abstract:
Mixtures containing A) at least one aprotic organic solvent or a mixture of aprotic solvents which is/are liquid at room temperature, B) at least one compound of the general formula (I) or (II), where the variables are defined as follows: the radicals R 1 are different or identical and are each selected from among C 1 -C 10 -alkyl, C 1 -C 10 -alkoxy, C 3 -C 10 -cycloalkyl, benzyl and C 6 -C 14 -aryl, in each case unsubstituted or monosubstituted or polysubstituted by C 1 -C 4 -alkyl, benzyl or phenyl, R 2 is selected from among COOR 7 , C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, C 3 -C 10 -cycloalkyl, benzyl, C 6 -C 14 -aryl, in each case unsubstituted or monosubstituted or polysubstituted by C 1 -C 4 -alkyl, benzyl or phenyl, R 3 , R 4 are different or identical and are each selected from among hydrogen, C 1 -C 10 -alkyl, C 3 -C 10 -cycloalkyl, benzyl and C 6 -C 14 -aryl, in each case unsubstituted or monosubstituted or polysubstituted by C 1 -C 4 -alkyl, benzyl or phenyl, or >C(R 3 ) 2 is a >C=O group, the radicals X may be different or identical and are each selected from among oxygen, sulphur, N-R 5 and C(R 6 ) 2 , where R 5 is selected from among C 1 -C 10 -alkyl, C 3 -C 10 -cycloalkyl, benzyl and C 6 -C 14 -aryl, in each case unsubstituted or monosubstituted or polysubstituted by C 1 -C 4 -alkyl, benzyl or phenyl, the radicals R 6 are different or identical and are each selected from among hydrogen, C 1 -C 10 -alkyl, C 3 -C 10 -cycloalkyl, benzyl and C 6 -C 14 -aryl, in each case unsubstituted or monosubstituted or polysubstituted by C 1 -C 4 -alkyl, benzyl or phenyl, R 7 is selected from among C 1 -C 4 -alkyl, n is an integer in the range from 1 to 3, C) water in the range from 0 to 30 ppm, D) optionally at least one further additive, E) optionally at least one lithium salt.
Abstract:
The invention relates to a method for producing electrode materials, characterized in that a mixed oxide comprising Li and at least one transition metal as a cation is treated with at least one boron compound comprising at least one alkoxy group or at least one halogen atom per molecule.
Abstract:
Compounds of formula (I), wherein q is 1, 2 or 3, r is 1, 2 or 3, and Y is a q+r valent non-fluorinated alkylene group having 1 to 12 C-atoms, wherein one or more CH2-units of the alkylene group which are not directly bound to CN or SO2F may be replaced by O, for use in electrolyte compositions.