MOF Anode Layer in All-Solid-State Batteries for Safe Li-Ion Conduction

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Solution Overview

Problem

Conventional lithium secondary batteries using liquid electrolytes face safety issues such as leakage and fire risks, prompting the need for an all-solid-state battery with improved safety and performance.

Innovation Solution

An all-solid-state battery design incorporating a metal-organic framework (MOF) anode layer with a sulfide-based solid electrolyte, which includes a specific composition of metal ions and organic ligands, such as 2,5-thiophenedicarboxylic acid, to enhance lithium ion conductivity and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If liquid electrolytes are used in lithium secondary batteries, then high energy density and large capacity are achieved, but safety issues such as leakage and fire risk occur

Engineering Contradiction:

Improveenergy densityVSAvoidsafety

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent changes the physical state of the electrolyte from liquid to solid, fundamentally altering the safety characteristics while maintaining lithium ion conductivity. The solid electrolyte layer eliminates leakage and fire risks associated with liquid electrolytes while preserving the high energy density required for battery performance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite structure consisting of a solid electrolyte layer combined with a metal-organic framework (MOF) anode layer. This composite material approach allows the solid electrolyte to provide safety benefits while the MOF structure enhances lithium ion conductivity and electrochemical performance, resolving the contradiction between safety and energy density.

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 battery achieves improved initial coulombic efficiency and capacity retention rate, addressing safety concerns and enhancing overall performance.

Implementation Method 1

a positive electrode and a negative electrode which intercalate and deintercalate lithium ion

Methodology Applied

Scientific EffectIntercalation: Absorption (physical)

Implementation Method 2

metal atoms coordinated to organic ligands (e.g., metal organic framework linkers)

Methodology Applied

Scientific EffectCoordination bonding: Chemical Bonding

Implementation Method 3

a solid electrolyte layer disposed on the anode layer

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS20250015290A1All-solid-state battery having anode layer including metal-organic framework

Publication Date: 2025.01.09 HYUNDAI MOTOR CO LTD

AI summary

The present disclosure relates to an all-solid-state battery having an anode layer including a solid electrolyte metal-organic framework; a solid electrolyte layer disposed on the anode layer; and a cathode layer disposed on the solid electrolyte layer. The all-solid-state battery may further include a lithium layer interposed between the anode layer and the solid electrolyte layer.