Tyutyunnik A. P. RussiaYekaterinburg Institute of Chemistry of a Solid body UB of RAS, 91, GSP, Pervomayskaya St., Yekaterinburg, 620990 Author's articles Phase equilibria in the system poly(butadiene-CO-acrylonitrile) – lithium perchlorate Chemical interaction in the cathode half-element of lithium ion batteries