IONICALLY PERMEABLE STRUCTURES FOR ENERGY STORAGE DEVICES

摘要

An electrochemical stack comprising carrier ions, an anode comprising an anode active material layer, a cathode comprising a cathode active material layer, a separator between the anode and the cathode comprising a porous dielectric material and a non-aqueous electrolyte, and an ionically permeable conductor layer located between the separator and an electrode active material layer.

主权项

1. An electrochemical stack comprising carrier ions, an anode comprising an anode active material layer, a cathode comprising a cathode active material layer, a separator between the anode and the cathode comprising a porous dielectric material and a non-aqueous electrolyte, and an ionically permeable conductor layer located between the separator and an electrode active material layer, the electrode active material being the anode active material layer or the cathode active material layer so wherein upon application of a current to store energy in the electrochemical stack or an applied load to discharge the electrochemical stack: (i) the carrier ions travel between the anode and cathode active material layers and through the ionically permeable conductor layer and separator as they travel between the anode active and cathode active material layers, (ii) the anode active material layer, the cathode active material layer, and the ionically permeable conductor layer each have an electrical conductance, (iii) the anode active material layer, the cathode active material layer, the ionically permeable conductor layer and the separator each have an ionic conductance for the carrier ions, (iv) the ratio of the ionic conductance of the ionically permeable conductor layer to the ionic conductance of the separator is at least 0.5:1, (v) the ratio of the electrical conductance of the ionically permeable conductor layer to the electrical conductance of the electrode active material layer is at least 100:1, and (vi) the ratio of the electrical conductance to the ionic conductance of the ionically permeable conductor layer is at least 1,000:1.