Pb2MF6 Cathode Composition for High-Voltage Fluoride-Ion Batteries
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Solution Overview
Problem
There is a demand for improving the performance of fluoride ion batteries, specifically in need of a novel cathode active material that enhances charge and discharge properties.
Innovation Solution
A cathode active material comprising a composition represented by Pb2MF6, where M is at least one of Mn, Fe, Co, and Ni, is used in a fluoride ion battery, exhibiting specific crystal structure peaks in X-ray diffraction measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cathode active materials (such as CeFx, CuF, CuF2, PbF2, PbF4, or MFx) are used in fluoride ion batteries, then the battery can operate with basic charge and discharge functionality, but the charge and discharge properties and overall performance are insufficient
Solution Approach 1:
The patent changes the compositional parameters of the cathode active material by using Pb2MF6 compounds where M can be Mn, Fe, Co, or Ni. This compositional parameter change results in improved charge and discharge properties and overall battery performance compared to conventional materials like CeFx or simple MFx compounds.
Solution Approach 2:
The patent employs composite material strategy by combining Pb with transition metal elements (Mn, Fe, Co, or Ni) in a specific stoichiometric ratio (Pb2MF6). This composite approach creates a material with enhanced electrochemical properties that overcome the limitations of single-element fluoride compounds.
2Use of energy by moving object
If high-voltage and high-energy density are pursued in fluoride ion batteries, then energy storage capability is improved, but the charge and discharge rate properties deteriorate
Solution Approach 1:
The patent optimizes the compositional parameters of the cathode material (Pb2MF6) to achieve a balance between energy density and charge/discharge rate. The specific stoichiometry and choice of M element allow the material to maintain high voltage capability while improving rate properties through enhanced ionic and electronic conductivity.
Solution Approach 2:
The patent introduces local quality variations by selecting different M elements (Mn, Fe, Co, Ni) that provide localized electronic and ionic conductivity enhancements. This allows different regions of the material to contribute differently to overall performance, with some areas optimized for energy storage and others for rapid ion transport.
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 use of the Pb2MF6 cathode active material in fluoride ion batteries results in excellent charge and discharge properties, including high voltage capability and improved rate properties, effectively addressing the need for enhanced battery performance.
Implementation Method 1
a cathode active material used in a fluoride ion battery, the cathode active material comprising: a composition represented by Pb2MF6
Implementation Method 2
an electrolyte layer formed between the cathode active material layer and the anode active material layer
Data Source
AI summary
A main object of the present disclosure is to provide a novel cathode active material that can be used in a fluoride ion battery. The present disclosure achieves the object by providing a cathode active material used in a fluoride ion battery, the cathode active material comprising: a composition represented by Pb2MF6, in which M is at least one of Mn, Fe, Co, and Ni.