Polymer electrolyte containing an anion-stabilizing polymer and method for manufacturing the same

Polymer electrolyte with anion stabilization via thioamide hydrogen bonding

This technology utilizes a block copolymer containing polydithiooxamide (PDTOA) and hydrophilic polyethylene oxide (PEO) blocks. By inducing hydrogen bonding between the thioamide functional groups of the PDTOA and the lithium salt anions, it restricts anion diffusion and enhances the lithium-ion transference number.

Conventional PEO-based polymer electrolytes suffer from low mechanical strength and concentration polarization caused by the free movement of anions within the electrolyte, which limits the charge/discharge rates of lithium-ion batteries.

By designing a block copolymer (PEO-b-PDTOA) with a nanostructured (lamellar) morphology containing PDTOA blocks, this technology is ideal for simultaneously improving the reliability and efficiency of secondary battery electrolytes.

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Key Features:

• A polymer electrolyte characterized by the inclusion of a block copolymer containing polydithiooxamide blocks and a lithium salt.
• A polymer electrolyte comprising a polyethylene oxide and polydithiooxamide block copolymer along with a metal salt.
• A configuration that induces hydrogen bonding between the thioamide functional groups of polydithiooxamide and lithium salt anions.
• An anion-stabilizing polymer electrolyte structure that restricts anion diffusion to enhance lithium-ion transport performance.

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