PROCESS FOR THE PREPARATION OF AN ELECTROLYTE

摘要

The invention provides a process for preparing a crystalline vanadyl sulphate / vanadous sulphate material, the process including the steps of providing a mixture of vanadium pentoxide (V₂O₅) and vanadium trioxide (V₂O₃); adding to the mixture a predetermined volume of a sulphuric acid solution to produce a powder slurry; and heating the slurry at a temperature and for a time sufficient to form a crystalline vanadyl sulphate / vanadous sulphate material. The invention extends to a process for preparing an electrolyte from such a crystalline vanadyl / vanadous sulphate material, including the steps of dissolving the crystalline material in boiling water and adding a stabilising agent, typically phosphoric acid, to stabilise the electrolyte.