Solid-State Battery Electrolyte Porous Dense Structure
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Solution Overview
Problem
Current lithium-ion batteries face safety concerns due to combustible organic components, degradation from reaction products at the anode and cathode interfaces, and limitations in power and energy density due to poor electrochemical stability of organic electrolytes, which are also present in sodium and magnesium ion conducting batteries.
Innovation Solution
The development of a solid-state, ion-conducting battery with a solid-state electrolyte comprising a dense region and porous regions, where the cathode and anode materials are disposed on the porous regions, and a current collector is used on the dense region, allowing for enhanced ion diffusion and reduced mechanical stress, eliminating the formation of solid electrolyte interphase layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic electrolytes are used in lithium-ion batteries, then ionic conductivity is improved, but safety deteriorates due to combustible organic components
Solution Approach 1:
The patent changes the physical state of the electrolyte from liquid (organic) to solid, fundamentally altering the safety characteristics while maintaining ionic conductivity functionality. The solid-state electrolyte eliminates combustible organic components while providing sufficient ion transport for battery operation.
Solution Approach 2:
The patent creates a solid-state electrolyte that copies the ionic conductivity function of organic electrolytes but uses inorganic materials (such as sulfides, oxides, or halides) that are non-combustible, thereby achieving the same functional purpose without the harmful combustible properties.
2Duration of action of stationary object
If organic electrolytes are used in lithium-ion batteries, then ionic conductivity is maintained, but degradation occurs due to formation of solid electrolyte interphase at interfaces
Solution Approach 1:
The patent extracts and eliminates the problematic solid electrolyte interphase formation mechanism by replacing organic electrolytes with solid-state inorganic electrolytes. This removes the source of degradation reactions at the electrode-electrolyte interfaces while preserving the essential ion conduction function.
3Power
If organic electrolytes are used in lithium-ion batteries, then electrochemical stability is poor, but power and energy density are limited
Solution Approach 1:
The patent changes the electrochemical stability parameter by transitioning from organic to solid-state inorganic electrolytes, which inherently provide superior electrochemical stability. This enables the battery to achieve both high power density and enhanced electrochemical stability simultaneously.
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
This design provides improved safety, stability, and increased power and energy density by using non-flammable solid electrolytes, reducing mechanical stress, and eliminating capacity fade mechanisms, resulting in a longer battery life and higher energy storage capacity.
Implementation Method 1
a solid-state electrolyte (SSE) material comprising a porous region having a plurality of pores, and a dense region
Implementation Method 2
ions diffuse into and out of the porous region of the SSE material during charging and/or discharging of the battery
Data Source
AI summary
Solid-state, ion-conducting batteries with an ion-conducting, solid-state electrolyte. The solid-state electrolyte has at least one porous region (e.g., porous layer) and a dense region (e.g., dense layer). The batteries are, for example, lithium-ion, sodium-ion, or magnesium-ion conducting solid-state batteries. The ion-conducting, solid-state electrolyte is, for example, a lithium-garnet material.