Solid Electrolyte Battery Anode Interface Using a Porous Ceramic Layer

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Solution Overview

Problem

Solid electrolyte batteries face challenges with contact between the anode and solid electrolyte, leading to constriction currents and lithium dendrite formation, which existing solutions like using a conductive liquid fail to fully address due to risks of leakage and incomplete dendrite prevention.

Innovation Solution

A process involving protonation and deprotonation of a ceramic material to create a porous layer, allowing for improved infiltration and contact between the anode and solid electrolyte, reducing the risk of dendrite formation by increasing the contact area and avoiding constriction currents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conductive liquid is placed between the ceramic compound and lithium anode to improve contact, then contact between the two elements is improved, but the risk of liquid leakage and formation of lithium dendrites increases

Engineering Contradiction:

Improvecontact qualityVSAvoidliquid leakage risk and dendrite formation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies porous materials by creating a porous layer within the solid electrolyte through protonation and deprotonation treatment. This porous structure allows the metallic anode to infiltrate and form intimate contact without requiring liquid electrolytes, thus improving contact quality while avoiding liquid leakage risks and dendrite formation

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The patent changes the physical-chemical parameters of the solid electrolyte by introducing protonation and deprotonation treatment. This transforms the solid electrolyte surface to create a porous structure with optimized pore size and distribution, enabling better anode infiltration and contact while maintaining solid-state safety characteristics

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If ceramic compound is used as solid electrolyte to avoid liquid leakage, then safety is improved, but contact between anode and solid electrolyte is poor leading to constriction currents

Engineering Contradiction:

Improveliquid leakage preventionVSAvoidcontact quality

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent transforms the dense ceramic structure into a porous layer through controlled protonation and deprotonation. The resulting porous structure maintains the solid-state safety advantages while providing pathways for anode infiltration, thereby improving contact quality and eliminating constriction currents without compromising leakage prevention

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The patent creates a composite structure by combining the solid ceramic electrolyte with a porous layer formed through chemical treatment. This composite architecture integrates the safety benefits of solid ceramics with the contact advantages of porous structures, resolving the contradiction between safety and contact quality

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 process enhances the contact between the anode and solid electrolyte, reducing the risk of lithium dendrite formation and improving the overall performance of solid electrolyte batteries by increasing the contact area and preventing constriction currents.

Implementation Method 1

a step of deprotonation of the protonated layer, so as to obtain a porous layer equipped with mini-cavities

Methodology Applied

Scientific EffectDeprotonation:

Implementation Method 2

a step of depositing a metallic element forming an anode on the deprotonated layer of a first side of the body, and of infiltrating the metallic element into these mini-cavities of the porous layer

Methodology Applied

Scientific EffectInfiltration: Diffusion

Data Source

PatentEP4258379A1Battery with solid electrolyte and manufacturing method thereof by deprotonation

Publication Date: 2023.10.11 THE SWATCH GRP RES & DEVELONMENT LTD

Figure 1~2b
Figure 2c~2f

AI summary

The invention relates to a battery (20) with a solid electrolyte (8) and its method of manufacture, the method comprising the following successive steps: - a step of protonation of a body (11) comprising, preferably in whole, a ceramic material capable of being protonated, to form a protonated layer (12, 13) on the body (11), - a step of deprotonation of the protonated layer (13), so as to obtain a porous layer having mini-cavities (18), - a step of deposition of a metallic element forming anode (14) on the deprotonated layer (13) on a first side (7) of the body (11), and of infiltration of the metallic element into mini-cavities (18) of the porous layer, and - a step of assembly of a cathode (15) on a second side (9) of the body (11), preferably opposite to the first side (7) of the anode (14).