Nitrogen Battery Electrolyte Using LiFSI for Higher Voltage
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Solution Overview
Problem
Existing nitrogen batteries suffer from insufficient discharge voltage, electric capacity, and ammonia production efficiency, and existing fuel synthesis methods are not efficient.
Innovation Solution
A nitrogen battery design using lithium bis(fluorosulfonyl)imide (LiFSI) as a supporting electrolyte with ether as a solvent on the positive electrode, combined with a metal-organic framework containing transition metal ions, promotes high discharge voltage and efficient ammonia synthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional supporting electrolytes (e.g., LiTFSI) are used in nitrogen batteries, then the battery structure is simple, but the discharge voltage and electric capacity are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the supporting electrolyte from conventional LiTFSI to LiFSI (lithium bis(fluorosulfonyl)imide). This parameter change in the electrolyte composition enables higher discharge voltage and electric capacity in the nitrogen battery while maintaining a relatively simple electrolyte system.
2Productivity
If conventional fuel synthesis methods are used, then the process is simple, but the ammonia production efficiency is low
Solution Approach 1:
The patent changes the electrolyte composition parameter to LiFSI, which directly improves the nitrogen reduction reaction efficiency and thereby increases ammonia production efficiency. This parameter change in the electrolyte simultaneously enhances both the battery performance and the fuel synthesis efficiency without requiring complex additional synthesis systems.
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 battery achieves high electric capacity and energy density, and ammonia is synthesized with high efficiency using this design.
Implementation Method 1
an ion-conducting medium containing lithium bis(fluorosulfonyl)imide (LiFSI) as at least a supporting electrolyte of the positive electrode, containing ether as a solvent present at least on a positive electrode side, and conducting alkali metal ions
Implementation Method 2
combined with a metal-organic framework containing transition metal ions, promotes high discharge voltage and efficient ammonia synthesis
Implementation Method 3
the theoretical capacity density of nitrogen, calculated from the reduction reaction corresponding to the battery discharge, is extremely high at 5740 mAh/g
Data Source
AI summary
The present invention relates to a nitrogen battery comprising:a positive electrode using nitrogen as a positive electrode active material;a negative electrode; andan ion-conducting medium containing lithium bis(fluorosulfonyl)imide as at least a supporting electrolyte of the positive electrode, containing ether as a solvent present at least on the positive electrode side, and conducting alkali metal ions.