Binder-Enhanced Solid Electrolyte for Lower Interfacial Resistance

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Solution Overview

Problem

All-solid batteries face challenges in improving ion conductivity due to interfacial resistance in their solid electrolytes, which limits their energy density and lifetime.

Innovation Solution

A solid electrolyte comprising a solid-phase lithium dissociation material, a binder, and a lithium salt is developed, which reduces interfacial resistance and enhances ion conductivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the solid electrolyte composition is optimized to improve ion conductivity, then energy density and lifetime are improved, but manufacturing complexity increases

Engineering Contradiction:

Improveenergy densityVSAvoidmanufacturing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into a single solid electrolyte layer: it simultaneously serves as the ion conductor, the adhesive layer, and the lithium ion source. By integrating the lithium salt directly into the solid electrolyte composition rather than separating it into a distinct electrode component, the patent simplifies the overall battery structure and manufacturing process while achieving high energy density through optimized lithium content

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The improved ion conductivity of the solid electrolyte leads to increased energy density and extended lifetime of the all-solid battery.

Implementation Method 1

a solid-phase lithium dissociation material

Methodology Applied

Scientific EffectLithium dissociation: Ion Exchange

Implementation Method 2

The solid electrolyte according to the present disclosure has an effect of improving adhesive force and strength due to the binder

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS20250046866A1Solid electrolyte and all solid battery comprising same

Publication Date: 2025.02.06 LG ENERGY SOLUTION LTD

AI summary

The present disclosure relates to a solid electrolyte for an all-solid battery and an all-solid battery comprising the same, wherein the solid electrolyte comprises a binder to enhance adhesive force and strength, thereby reducing interfacial resistance and thus improving ion conductivity.