Anion-Receptor Polymer Electrolyte for Higher Alkali-Ion Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The addition of alkali metal salts to electrolytes in batteries leads to a decrease in the transport number of alkali metal ions due to the migration of anions, which affects ionic conductivity.
Innovation Solution
A polymer containing structural units with an alkali metal ion as a counter cation and functional groups acting as anion receptors, such as those with electron-deficient atoms, is used to capture and suppress the mobility of anions, thereby enhancing the transport number of alkali metal ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an alkali metal salt is added to increase ionic conductivity, then ionic conductivity is improved, but the transport number of the alkali metal ion decreases due to anion migration
Solution Approach 1:
The patent introduces a polymer electrolyte as an intermediary substance between the alkali metal salt and the electrode. This polymer contains anion receptor functional groups that selectively bind anions, mediating the interaction between ions and preventing harmful anion migration while maintaining high ionic conductivity and transport number of alkali metal ions
Solution Approach 2:
The patent changes the chemical parameters of the electrolyte system by incorporating a polymer with specific functional groups (anion receptors) that have high affinity for anions. This parameter change in the electrolyte composition allows simultaneous achievement of high ionic conductivity and high transport number by controlling anion behavior through chemical interaction
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 polymer effectively suppresses the decrease in transport number of alkali metal ions, improving ionic conductivity by promoting the mobility of alkali metal ions and reducing anion migration.
Implementation Method 1
a functional group with a function as an anion receptor... The functional group may contain an electron-deficient atom... effectively suppresses the decrease in transport number of alkali metal ions... reducing anion migration
Data Source
AI summary
A polymer containing a structural unit (A) having an anion moiety with an alkali metal ion as a counter cation and a structural unit (B) having a functional group with a function as an anion receptor.