Hybrid cell design of alternately stacked or wound lithium ion battery and capacitor electrodes

[0028]In a first embodiment of this invention, four different electrochemical cell units of opposing positively-charged and negatively-charged porous electrodes of varying compositions of particulate electrode materials are described. Combinations of two or more pairs of these electrodes (cell units) are assembled for use in forming hybrid lithium-ion battery / capacitor cells in accordance with one embodiment of this invention. In a hybrid battery / capacitor electrochemical cell, a predetermined combination of the pairs of opposing electrodes will be assembled with interposed porous separators and the pores of the assembled electrodes and separators infiltrated with a liquid solution of a suitable lithium containing electrolyte.

[0029]As stated, in practices of this invention, electrodes are formed of various combinations particles of capacitor materials and lithium-ion battery materials. Activated carbon particles are preferred for use as capacitor materials, whether the electrode in