Solid-State Battery Porous Electrolyte Interface for Dendrite Control
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Solution Overview
Problem
Solid-state batteries face challenges in achieving effective contact between the anode and solid electrolyte, leading to lithium dendrite formation and short circuits due to constriction currents, which existing solutions like liquid electrolytes cannot fully address without risking leakage.
Innovation Solution
A method involving protonation and deprotonation of a ceramic body to create a porous layer, allowing a metal anode to infiltrate and improve contact with the solid electrolyte, reducing the risk of lithium dendrite formation by increasing the contact area and preventing constriction currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid electrolyte is used to improve contact between the anode and solid electrolyte, then the contact quality improves, but the risk of leakage and lithium dendrite formation increases
Solution Approach 1:
The patent applies porous materials by creating a porous layer within the solid electrolyte through protonation and deprotonation cycles. This porous structure allows the metal anode to infiltrate and form intimate contact throughout the electrolyte volume, achieving reliable electrical contact without using liquid electrolytes that could leak or form dendrites.
Solution Approach 2:
The patent changes the physical-chemical parameters of the solid electrolyte by introducing protons through protonation, which modifies the material's properties. The protonated solid electrolyte is then deprotonated to create the porous structure, effectively changing the material state from dense to porous while maintaining solid-state properties, thereby achieving good contact without liquid electrolyte risks.
2Object-affected harmful factors
If a dense solid electrolyte is used to prevent leakage, then safety improves, but contact with the anode is insufficient leading to constriction currents
Solution Approach 1:
The patent transforms the dense solid electrolyte into a porous structure through protonation and deprotonation. The resulting porous layer maintains the solid-state safety (no leakage) while providing extensive surface area and infiltration pathways for the metal anode, ensuring uniform current distribution and preventing constriction currents.
Solution Approach 2:
The patent transitions from a two-dimensional surface contact between anode and electrolyte to a three-dimensional volumetric contact by creating pores throughout the electrolyte bulk. This dimensional change allows the anode to penetrate and contact the electrolyte throughout its volume, dramatically improving contact quality while maintaining leakage prevention.
3Reliability
If the contact area between anode and solid electrolyte is increased to prevent constriction currents, then dendrite formation is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-forming the porous structure within the solid electrolyte before assembling the battery components. The protonation and deprotonation steps create the infiltration-ready porous network in advance, so that when the metal anode is deposited, it naturally penetrates the pores without requiring additional complex processing steps to achieve high contact area.
Solution Approach 2:
The patent uses parameter changes (protonation state) as a controllable switch to create the porous structure. By controlling the protonation/deprotonation conditions, the porous morphology can be tuned to optimize contact area while maintaining manageable manufacturing complexity. The chemical parameter change provides a straightforward pathway to structure modification.
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 method enhances the contact between the anode and solid electrolyte, reducing lithium dendrite formation and improving the overall performance of solid-state batteries by increasing the contact area and preventing unwanted currents.
Implementation Method 1
a step of deprotonating the protonated layer so as to obtain a porous layer provided with mini-cavities
Implementation Method 2
a step of depositing a metal element forming an anode on the deprotonated layer on a first side of the body, and of infiltrating these mini-cavities of the porous layer by the metal element
Data Source
AI summary
A solid-state battery (20) with a solid electrolyte (8) and to the method for producing same. The method includes: protonating a body (11) made of, a protonatable ceramic material, to form a protonated layer (12, 13) on the body (11); deprotonating the protonated layer (13) to obtain a porous layer provided with mini-cavities (18); depositing a metal element forming an anode (14) on the deprotonated layer (13) on a first side (7) of the body (11), and infiltrating mini-cavities (18) of the porous layer by the metal element, and assembling a cathode (15) on a second side (9) of the body (11), preferably opposite the first side (7) of the anode (14).