Non-aqueous electrolyte electrochemical generator - using polyvinylidene polymer as active material for positive electrode

摘要

Positive active material comprises a macromolecular polymer of formula CXY-CX'Y' n (I) or (II) where in (I) and (II) X and X' are Cl, Br, I, CO3 or SO4, these gps. being shared between 2 C atoms of the polymer, and in (I) Y and Y' are R, Cl, Br, I, CN, NRR' or OR, R and R' being H or (m)ethyl, while in (II) Y' is H, Cl or Br. Pref. in (I) Y and Y' are both H, or Y is CN, and Y' is Cl or Br. Pref. in (II) X and X' are Cl or Br. The battery has high discharge potential (about 3 volts relative to Li for polyvinylchloride or bromide) and a high theoretical electrical capacity per unit mass (550 and 290 mAh/g in a one-step potential, for (-CHCl-CHCl-)n and (CHBr-CHBr-)n respectively and 650 mAh/g in a two-step potential for (C-CCl2-CCl2-)n.