The POLYSTORAGE summer school “Chemistry of Electric Storage Materials” organized by Uppsala University will take place as hybrid event from 14th – 18th June 2021. During this intense week, the course will include 10 x 2 hour lectures and 2 x 2 hour tutorials given by top-class lecturers from the POLYSTORAGE consortium (Kristina Edström, Robert Dominko and Daniel Brandell) as well as from other universities and industry.