Compliant Solid-State Electrolyte Composite for Dendrite Resistance

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Solution Overview

Problem

Existing solid-state electrolytes face challenges in maintaining contact with electrodes due to poor adhesion and brittleness, leading to high bulk resistance and dendrite formation, which hinders large-scale commercialization.

Innovation Solution

A solid-state composition comprising an ionically conductive amorphous inorganic material, a non-ionically conductive polymer with a specific molecular weight range, and a non-ionically conductive binder, which together form a compliant and conductive film without sacrificing ionic conductivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If glass and ceramic solid-state conductors are used, then ionic conductivity is improved, but mechanical compliance deteriorates

Engineering Contradiction:

Improveionic conductivityVSAvoidmechanical compliance

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the mechanical parameters of the solid-state electrolyte by incorporating it into a polymer matrix. This transforms the brittle inorganic material into a compliant composite that can be processed into thin films while maintaining the high ionic conductivity of the inorganic component.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

By creating a composite of inorganic electrolyte particles in a polymer matrix, the patent achieves both high ionic conductivity from the inorganic phase and mechanical compliance from the polymer phase, enabling processing into dense thin films.

Inventive Principle:

Principle #40Composite materials

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 composition enables high ionic conductivity and mechanical compliance, allowing for dense, thin film processing and resistance to dendrite formation, facilitating the use of lithium metal anodes and sulfur cathodes in batteries.

Implementation Method 1

an ionically conductive amorphous inorganic material

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS12355075B2Compliant solid-state ionically conductive composite materials and method for making same

Publication Date: 2025.07.08 BLUE CURRENT INC

AI summary

Provided herein are ionically conductive solid-state compositions that include ionically conductive inorganic particles in a matrix of an organic material. The resulting composite material has high ionic conductivity and mechanical properties that facilitate processing. In particular embodiments, the ionically conductive solid-state compositions are compliant and may be cast as films. In some embodiments of the present invention, solid-state electrolytes including the ionically conductive solid-state compositions are provided. In some embodiments of the present invention, electrodes including the ionically conductive solid-state compositions are provided. The present invention further includes embodiments that are directed to methods of manufacturing the ionically conductive solid-state compositions and batteries incorporating the ionically conductive solid-state compositions.