3DOM-MOF Quasi-Solid Electrolyte for Safer Lithium-Ion Conduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lithium batteries face safety issues due to flammability and leakage of liquid organic electrolytes, and all-solid-state electrolytes have poor interfacial structure and low ionic conductivity.
Innovation Solution
A quasi-solid electrolyte composite material is developed using a three-dimensionally ordered macroporous metal-organic framework material combined with a polymer electrolyte and a small amount of liquid electrolyte, enhancing stability and ionic conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid organic electrolytes are used in traditional lithium batteries, then high ionic conductivity is achieved, but safety issues arise due to flammability and liquid leakage
Solution Approach 1:
The patent employs a three-dimensionally ordered macroporous (3DOM) metal-organic framework (MOF) structure as the electrolyte material. The porous 3DOM structure provides channels for ion transport while the solid framework eliminates flammability and leakage issues associated with liquid electrolytes. The macroporous architecture allows efficient Li ion conduction pathways while maintaining structural integrity and safety.
Solution Approach 2:
The patent creates a composite electrolyte system combining 3DOM-MOF materials with polymer matrices and controlled amounts of liquid electrolyte. This composite approach integrates the safety and structural stability of solid MOF materials with the ionic conductivity benefits of liquid electrolytes, achieving a balanced performance that resolves the safety-conductivity trade-off.
2Object-generated harmful factors
If all-solid-state electrolytes are used to improve safety, then flammability and leakage are eliminated, but interfacial structure between electrodes and electrolyte deteriorates and ionic conductivity decreases
Solution Approach 1:
The 3DOM-MOF structure provides well-defined macroporous channels that facilitate smooth ion transport interfaces with electrodes. The ordered macroporous architecture ensures good interfacial contact while maintaining open pathways for Li ion diffusion, resolving the issue of poor interfacial structure in conventional solid electrolytes.
Solution Approach 2:
The patent introduces different materials with specific functions into different regions of the electrolyte structure. The 3DOM-MOF provides the structural framework and ion transport channels, while polymer materials fill specific regions to enhance interfacial contact, and controlled amounts of liquid electrolyte are introduced into pores to boost ionic conductivity in critical regions.
3Object-generated harmful factors
If pure solid electrolyte materials are used to eliminate liquid electrolyte risks, then safety is improved, but manufacturing complexity increases and industrial production becomes difficult
Solution Approach 1:
The patent optimizes the composition parameters of the composite electrolyte, specifically controlling the ratio of 3DOM-MOF to polymer to liquid electrolyte components. By adjusting these parameters, the material achieves desired performance while maintaining compatibility with existing manufacturing processes, facilitating industrial production.
Solution Approach 2:
The 3DOM-MOF structure can be synthesized through scalable solvothermal methods and assembled into film forms suitable for battery manufacturing. The ordered macroporous structure is formed through self-assembly processes that are compatible with industrial production techniques, reducing manufacturing complexity compared to dense solid electrolyte 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 proposed electrolyte material improves safety by reducing flammable liquid content, enhances ion conduction rates, and is suitable for industrial production, offering superior performance in lithium-ion and lithium sulfur batteries.
Implementation Method 1
three-dimensionally ordered macroporous metal-organic framework material
Implementation Method 2
3DOM-MOF channel compounded with a small amount of a liquid electrolyte
Implementation Method 3
polymer electrolyte material... enhances ion conduction rates
Implementation Method 4
liquid electrolyte... compounded with a small amount of a liquid electrolyte and a polymer electrolyte
Data Source
AI summary
A three-dimensionally ordered macroporous (3DOM) metal-organic framework material (MOF)-based quasi-solid-state electrolyte thin film for a safe quasi-solid-state lithium secondary battery are provided by the present invention. In detail, the above quasi-solid-state electrolyte combines 3DOM-MOFs and the electrolytes like polymer and traditional liquid electrolyte. The special pore structures in 3DOM-MOFs could both fill the polymer electrolyte and liquid electrolyte with macropores and micropores, respectively. This unique structure could significantly enhance the Li+ conductivity rate through the different kinds of electrolytes in the corresponding pore structures as well as improve the battery performance. More importantly, this quasi-solid-state electrolyte is much safer than the traditional organic electrolyte. It should be easy to scale-up since the procedures are simple.