Perovskite Fluoride Battery Active Material
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Solution Overview
Problem
Current fluoride ion batteries lack active materials with favorable capacity properties, leading to limited performance in terms of energy density and cycle stability.
Innovation Solution
An active material with a perovskite structure, represented by ABO3 or its fluoride form, where A includes Group 2 and Group 3 metal elements and B includes transition metal elements from Period 4 to Period 6, preferably Co, is used to enhance the capacity and stability of fluoride ion batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional metal active materials such as Cu are used in fluoride ion batteries, then the battery can operate, but the capacity and energy density are limited
Solution Approach 1:
The patent changes the chemical composition parameters of the active material by using perovskite-structured compounds with specific A and B metal elements, transforming the material's electrochemical properties to achieve higher capacity and stability simultaneously
Solution Approach 2:
The patent employs composite perovskite structures combining different metal elements (A: Group 2-3 metals, B: transition metals from Period 4-6) to create a material with synergistic properties that enhance both capacity and cycle stability
2Use of energy by moving object
If higher capacity active materials are used to increase energy density, then the energy density improves, but the cycle property deteriorates
Solution Approach 1:
The patent modifies the crystal structure parameters and chemical composition of the active material through perovskite phase formation, enabling high energy density while maintaining structural stability over multiple cycles
Solution Approach 2:
Instead of accepting that high capacity materials have poor cycle stability, the patent inverts this relationship by discovering perovskite structures where high capacity and excellent cycle stability coexist, achieving the opposite of the conventional trade-off
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 active material exhibits high potential, high output, and improved energy density, along with enhanced cycle properties and rate performance, by facilitating intercalation reactions that maintain the crystal structure integrity during charge and discharge.
Implementation Method 1
by facilitating intercalation reactions that maintain the crystal structure integrity during charge and discharge
Data Source
AI summary
An active material has a favorable capacity property. The active material is to be used for a fluoride ion battery, the active material including a crystal phase having a perovskite structure, and represented by ABO3 or a fluoride of the ABO3, in which the A and the B are different metal elements; the A includes at least one kind of a metal element belonging to Group 2 and Group 3 in the periodic table; and the B includes at least one kind of a transition metal element belonging to Period 4 to Period 6 in the periodic table.