Process for making a cathode comprising the following steps (a) providing a cathode active material selected from layered lithium transition metal oxides, lithiated spinels, lithium transition metal phosphates with olivine structure, and lithium nickel-cobalt aluminum oxides, (b) treating said cathode active material with an oligomer bearing units according to general formula (I a), wherein R 1 are the same or different and selected from hydrogen, C 1 -C 4 -alkyl, aryl, and C 4 -C 7 -cycloalkyl, R 2 and R 3 are selected independently at each occurrence from phenyl, C 1 -C 8 -alkyl, C 4 -C 7 -cycloalkyl, C 1 -C 8 -haloalkyl, OPR 1 -*, and -(CR 9 2) p -Si(R 2) 2 -* wherein one or more non-vicinal CR 9 2 -groups may be replaced by oxygen, R 9 is selected independently at each occurrence from H and C 1 -C 4 -alkyl, and p is a variable from zero to 6, wherein the overall majority of R 2 and R 3 is selected from C 1 -C 8 -alkyl, and wherein the asterisk * is a placeholder for at least one more unit of formula (I a), or for an end-cap R 4 with R 4 being selected from C 1 -C 4 -alkyl, or for a branching, and, optionally, at least one of carbon in electrically conductive form and, optionally, a binder, (c) applying a slurry of said treated cathode active material to a current collector, and (d) at least partially removing solvent. (a) providing a cathode active material selected from layered lithium transition metal oxides, lithiated spinels, lithium transition metal phosphates with olivine structure, and lithium nickel-cobalt aluminum oxides, (b) treating said cathode active material with an oligomer bearing units according to general formula (I a), wherein R 1 are the same or different and selected from hydrogen, C 1 -C 4 -alkyl, aryl, and C 4 -C 7 -cycloalkyl, R 2 and R 3 are selected independently at each occurrence from phenyl, C 1 -C 8 -alkyl, C 4 -C 7 -cycloalkyl, C 1 -C 8 -haloalkyl, OPR 1 -*, and -(CR 9 2) p -Si(R 2) 2 -* wherein one or more non-vicinal CR 9 2 -groups may be replaced by oxygen, R 9 is selected independently at each occurrence from H and C 1 -C 4 -alkyl, and p is a variable from zero to 6, wherein the overall majority of R 2 and R 3 is selected from C 1 -C 8 -alkyl, and wherein the asterisk * is a placeholder for at least one more unit of formula (I a), or for an end-cap R 4 with R 4 being selected from C 1 -C 4 -alkyl, or for a branching, and, optionally, at least one of carbon in electrically conductive form and, optionally, a binder, R 1 are the same or different and selected from hydrogen, C 1 -C 4 -alkyl, aryl, and C 4 -C 7 -cycloalkyl, R 2 and R 3 are selected independently at each occurrence from phenyl, C 1 -C 8 -alkyl, C 4 -C 7 -cycloalkyl, C 1 -C 8 -haloalkyl, OPR 1 -*, and -(CR 9 2) p -Si(R 2) 2 -* wherein one or more non-vicinal CR 9 2 -groups may be replaced by oxygen, R 9 is selected independently at each occurrence from H and C 1 -C 4 -alkyl, and p is a variable from zero to 6, wherein the overall majority of R 2 and R 3 is selected from C 1 -C 8 -alkyl, and wherein the asterisk * is a placeholder for at least one more unit of formula (I a), or for an end-cap R 4 with R 4 being selected from C 1 -C 4 -alkyl, or for a branching, and, optionally, at least one of carbon in electrically conductive form and, optionally, a binder, (c) applying a slurry of said treated cathode active material to a current collector, and (d) at least partially removing solvent.