Composite Electrolyte Gel for High-Conductivity Separator-Free Batteries

The patent merges the separator function and binder function into a single component. The binder containing inorganic oxide particles and having gel-forming capability performs both the binding function and the separator function (providing mechanical strength and preventing short circuit), thereby eliminating the need for a separate separator layer and reducing device complexity while maintaining mechanical strength

The binder is designed to perform multiple functions simultaneously: it provides mechanical strength through inorganic oxide particles, creates gel structure for ion conduction, and acts as a separator preventing direct contact between electrodes. This multi-functional design eliminates the need for separate separator component

The electrolyte uses a composite structure where inorganic oxide particles (such as alumina, silica) are dispersed within a gel-forming binder matrix. The inorganic oxide provides mechanical strength and structural stability, while the gel-forming binder creates a three-dimensional network that allows efficient ion conduction. This composite approach enables simultaneous achievement of high ion conductivity and mechanical strength

The patent modifies the physical and chemical parameters of the binder by selecting compounds with specific gel-forming capabilities and molecular weights. By controlling the gel fraction, crosslinking density, and molecular weight of the binder, the electrolyte achieves optimal balance between ion conductivity (requiring high mobility) and mechanical strength (requiring structural rigidity)