Abstract: A positive electrode slurryfied mixture used in the manufacturing of a rechargeable battery, the mixture comprising: -a positive electrode active material comprising a lithium metal-based oxide, the metal in the lithium metal-based oxide comprising either one or more of Ni, Mn, Al and Co; -a carbon-basedconductivity enhancer; and -a binder material that is soluble in a polar aprotic solvent, characterized in that the mixture further comprises a powderous alkali hydroxyde compound having a water content less than 5wt%.