INTEGRATED ELECTRODE ASSEMBLY AND SECONDARY BATTERY USING SAME

摘要

Disclosed herein is an integrated electrode assembly including a cathode, an anode, and a separation layer disposed between the cathode and the anode. The cathode, the anode, and the separation layer are integrated with each other. The separation layer includes 3 phases including a liquid-phase component containing an ionic salt, a solid-phase component supporting the separation layer between the cathode and the anode, and a polymer matrix in which linear polymers and cross-linked polymers form a viscoelastic structure with the liquid-phase component and the solid-phase component being incorporated in the polymer matrix. The polymer matrix is coupled to each of the cathode and the anode. The liquid-phase component of the separation layer flows into the electrodes (i.e., the cathode and anode) during preparation of the integrated electrode assembly to greatly improve wetting properties of the electrodes and to increase ionic conductivity of the electrodes.

主权项

1. An integrated electrode assembly comprising a cathode, an anode, and a separation layer disposed between the cathode and the anode, wherein the cathode, the anode, and the separation layer are integrated with each other,
the separation layer comprises 3 phases comprising a liquid-phase component containing an ionic salt, a solid-phase component supporting the separation layer between the cathode and the anode, and a polymer matrix in which a linear polymer and a cross-linked polymer form a viscoelastic structure with the liquid-phase component and the solid-phase component being incorporated in the polymer matrix, the polymer matrix is coupled to each of the cathode and the anode, and wherein the liquid-phase component of the separation layer flows into the cathode and the anode during preparation of the integrated electrode assembly to increase ionic conductivity of the cathode and the anode, wherein the viscoelastic structure is formed such that independent gels, each comprising cross-linked polymers, are physically connected to each other by linear polymers with the viscoelastic structure being impregnated with the liquid-phase component, and the linear polymers provide a physical connection structure in the form of parts of the linear polymers permeating into gels of cross-linked polymers.