Copper Selenide Cathode Material for Higher-Density Fluoride Ion Batteries
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Solution Overview
Problem
The positive electrode active material for fluoride ion batteries disclosed in existing technologies has limitations in terms of energy density.
Innovation Solution
The use of copper selenide as a positive electrode active material, specifically Cu2Se, which enhances the discharging potential and electrochemical reaction efficiency, thereby improving the energy density of fluoride ion batteries by reducing overpotential and cell resistance compared to copper sulfide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If copper sulfide (CuxS) is used as positive electrode active material, then the battery can operate, but the energy density is insufficient
Solution Approach 1:
The patent changes the chemical composition parameter of the positive electrode active material from copper sulfide (CuxS) to copper selenide (CuxSe). This parameter change in the material's chemical formula leads to improved electrochemical reaction efficiency and higher energy density, as copper selenide provides better ionic conductivity and electrochemical performance compared to copper sulfide
Solution Approach 2:
The patent employs copper selenide as a composite active material that combines copper with selenium elements in specific ratios (where 1 < x ≤ 2). This composite material approach creates a new substance with superior properties compared to the original copper sulfide, achieving both high energy density and reliable electrochemical reaction efficiency
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 implementation of copper selenide as a positive electrode active material in fluoride ion batteries leads to increased specific capacity and energy density, with reduced overpotential and cell resistance, resulting in improved battery performance.
Implementation Method 1
it is considered that copper selenide is fluorinated during charging of a fluoride ion battery and defluorinated during discharging
Implementation Method 2
an electrolyte layer, wherein the positive electrode active material layer comprises a positive electrode active material
Data Source
AI summary
Disclosed is a positive electrode active material capable of improving the energy density of a fluoride ion battery. The positive electrode active material for a fluoride ion battery of the present disclosure comprises copper selenide.