Electrochemical generator with composite electrode comprising two different solid electrolytes and process of manufacture

摘要

An electrochemical power cell, having a composite electrode comprising mineral and organic solid electrolytes, is new. An electrochemical power cell has cathode and anode electrodes, one or each of which is a composite electrode comprising an active material, a current collector and mineral type and organic type solid electrolytes optionally containing a dispersed electronic conduction additive. A thin film of the mineral electrolyte wets and covers at least part of the surface of the activ material particles to protect the covered surface from passivation or degradation reactions and to maintain the quality of ion a electron exchanges between the active material and other constituents of the composite, the mineral electrolyte being impermeabl components of the organic electrolyte. Independent claims are also included for the following: (i) a composite electrode as described above, the organic solid electrolyte being in contact with the collector; and (ii) preparation of the above electrode by mixing active material particles into an aqueous solution of the mineral electrolyte, drying the solution to obtain coated powder particles, mixing the powder with an organic electrolyte and coating a current colle with the mixture.