Double current collector negative electrode design for alkali metal ion electrochemical cells

An electrochemical cell, which comprises:

• a) a positive electrode of a cathode active material;
• b) a negative electrode of an alkali metal, having spaced apart first and second major sides positioned between first and second current collectors, wherein a first anode material contacts the opposite side of the first current collector and a second anode material contacts the opposite side of the second current collector, and wherein the first and second anode materials are capable of intercalating and de-intercalating the alkali metal;
• and
• c) a nonaqueous electrolyte activating the negative electrode and the positive electrode, wherein upon cell activation with the electrolyte, the alkali metal is completely consumed through migration and intercalation into the first and second anode materials.

An electrochemical cell, which comprises:

• a) a positive electrode of a cathode active material;
• b) a negative electrode of an alkali metal sandwiched between a first and second current collectors with an anode material selected from the group consisting of SnO, SnO2, SiO, tin-boron-phosphorous oxide, a carbonaceous material, V2O5, silver vanadium oxide, copper silver vanadium oxide, MnO2, TiS2, CuO2, Cu2S, FeS, FeS2, CFx, Ag2O, Ag2O2, CuF, Ag2CrO4, copper oxide, copper vanadium oxide, and mixtures thereof, contacted to at least one of the first and second current collectors opposite the alkali metal and facing the positive electrode;
• and
• c) a nonaqueous electrolyte activating the negative electrode and the positive electrode.

A method for providing an electrochemical cell, comprising the steps of:

• a) providing a positive electrode of a cathode active material capable of intercalating and deintercalating an alkali metal;
• b) providing a negative electrode comprising the alkali metal positioned between first and second current collectors, wherein a first anode material contacts the opposite side of the first current collector and a second anode material contacts the opposite side of the second current collector;
• and
• c) activating the negative electrode and the positive electrode with a nonaqueous electrolyte, wherein upon cell activation with the electrolyte, the alkali metal is completely consumed through migration and intercalation into the first and second anode materials.