Gel polymer electrolyte containing a crosslinked structure in the form of an ionic liquid and method for manufacturing the same

Gel polymer electrolyte with enhanced strength via tetrazolium self-crosslinking and a bi-continuous phase

This technology forms a positively charged polymer backbone by self-crosslinking an acrylonitrile-based polymer containing azide groups (-N3) via tetrazolium crosslinking. By incorporating negatively charged counter ions and a liquid electrolyte, it creates a bi-continuous structure (forming ion channels) that simultaneously improves lithium-ion conductivity and mechanical strength.

Conventional gel polymer electrolytes offer excellent ionic conductivity due to the inclusion of liquid electrolytes, but they suffer from significantly reduced mechanical strength as the liquid electrolyte resides between polymer chains. Introducing crosslinked structures to improve mechanical strength typically leads to a trade-off where electrochemical properties are compromised.

This technology introduces a tetrazolium-based self-crosslinking structure into an acrylonitrile-based polymer to secure mechanical strength. By forming a bi-continuous structure with counter ions to establish lithium-ion conduction channels, it contributes to enhancing material competitiveness in the secondary battery electrolyte sector.

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Key Features:

• Positively charged crosslinked polymer containing tetrazolium for the self-crosslinking of azide-functionalized acrylonitrile-based polymers
• Negatively charged counter ions and liquid electrolyte forming the electrolyte system alongside the tetrazolium-crosslinked polymer
• Configuration for securing mechanical strength by introducing a self-crosslinking structure into azide-functionalized acrylonitrile-based polymers
• Gel polymer electrolyte structure that implements ion channels by forming a bi-continuous phase with counter ions

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