Lithium Air Battery Electrolyte Membrane Durability
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Solution Overview
Problem
Lithium air batteries face challenges in using nonvolatile electrolytes that provide sufficient physical strength, reduction resistance to lithium ions, and oxidation resistance to high cathode potentials, while also requiring a porous substrate for oxygen supply.
Innovation Solution
A reinforced electrolyte membrane with impregnated pores containing a polymer and electrolyte solution, including ionic liquids and lithium salts, is used, which enhances mechanical strength, ionic conductivity, and resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nonvolatile electrolyte is used in lithium air battery, then the battery can function with oxygen supply to cathode, but the electrolyte cannot provide sufficient physical strength
Solution Approach 1:
The patent uses a composite structure consisting of a porous polymer matrix combined with ionic liquid electrolyte. The polymer provides mechanical strength and structural integrity, while the ionic liquid fills the pores to provide ionic conductivity and electrochemical functionality. This composite approach resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The patent employs a porous polymer membrane as the electrolyte structure. The porous architecture allows the ionic liquid to be absorbed and distributed throughout the matrix, providing sufficient ionic conductivity while the polymer framework maintains mechanical strength. The pore structure also facilitates oxygen transport to the cathode.
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 solution ensures improved durability and performance of lithium air batteries by maintaining mechanical strength, enhancing ionic conductivity, and providing superior reduction and oxidation resistance.
Implementation Method 1
the electrolyte solution may include an ionic liquid and a lithium salt
Implementation Method 2
the pores in the reinforced membrane may be impregnated with a polymer and an electrolyte solution
Data Source
AI summary
Disclosed are an electrolyte membrane for a lithium air battery having good durability, a method of manufacturing the same, and a lithium air battery including the same. The electrolyte membrane for a lithium air battery may include a reinforced membrane and an electrolyte solution and is thus nonvolatile and capable of ensuring sufficient physical strength.