Аннотация:The review briefly outlines some of the main areas of using supercritical carbon dioxide for synthesis and modification of functional materials for electrochemical applications. Synthesis of supported metal nanoparticles as well as metal oxide nanoparticles / aerogels and modification of polymer electrolyte membranes are considered. The attempt of this work is to highlight the key benefits associated with the supercritical state of the solvent specifically for every listed application.