Solid Ion Conductor Composition for Low-Activation Lithium Transport

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Solution Overview

Problem

Existing all-solid lithium batteries require improved materials for enhanced conductivity and compatibility to achieve better stability and performance.

Innovation Solution

A solid ion conductor compound represented by Formula 1 (LixM1aM2bClyBrz) is developed, incorporating alkali metals, alkaline earth metals, transition metals, and lanthanide elements, which enhances lithium ionic conductivity through lattice expansion and reduced activation energy, and is used in a solid electrolyte and electrochemical cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If conventional solid electrolyte materials are used, then the battery structure is simplified, but the activation energy for lithium ion conduction remains high and conductivity is limited

Engineering Contradiction:

Improvebattery structureVSAvoidactivation energy

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent applies parameter changes by systematically varying the compositional parameters (x, a, b, y, z) in the compound formula LixM1aM2bClyBrz to optimize the crystal structure and electronic properties. This enables reduction of activation energy for lithium ion conduction while maintaining structural simplicity for battery integration

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If existing solid electrolyte materials are used, then manufacturing is simplified, but the battery performance at high rates and across broad temperature ranges is insufficient

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidhigh-rate characteristics

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent utilizes parameter changes in the compositional formula to enhance lithium ionic conductivity, which directly improves high-rate discharge characteristics and broadens temperature applicability. The optimized compound structure enables faster ion transport while maintaining ease of manufacture through conventional solid-state synthesis methods

Inventive Principle:

Principle #35Parameter changes

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 solid ion conductor compound improves lithium ionic conductivity, stability, and durability, enabling high-rate characteristics and broad temperature applicability in electrochemical cells.

Implementation Method 1

a solid ion conductor compound having excellent lithium ionic conductivity

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Implementation Method 2

enhances lithium ionic conductivity through lattice expansion and reduced activation energy

Methodology Applied

Scientific EffectLattice expansion: Thermal Expansion

Data Source

PatentUS12456751B2Solid ion conductor compound, solid electrolyte comprising the same, electrochemical cell comprising the same, and method of preparing the same

Publication Date: 2025.10.28 SAMSUNG ELECTRONICS CO LTD

AI summary

A solid ion conductor compound represented by Formula 1:LixM1aM2bClyBrz Formula 1wherein M1 is an alkali metal, an alkaline earth metal, a transition metal, or a combination thereof, M2 is a lanthanide element, or a combination thereof, 0<x<3.5, 0≤a<1.5, 0<b<1.5, 0<y<6, 0<z<6, and 0.166<y/z≤5.