Polymer Electrolyte for High Conductivity and Reliability
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Solution Overview
Problem
Conventional polymer electrolytes fail to achieve both high ionic conductivity and reliability, particularly in large-scale applications such as hybrid electric cars, where high voltage and intrinsic reliability are required, and they often contain significant amounts of organic solvents which compromise their performance.
Innovation Solution
A polymer electrolyte comprising a copolymer of ethylenically unsaturated compounds and carbon monoxide, with a weight ratio of 66.7% to 100% of the polymer material being 50 to 99 mol% of the copolymer, and a solvent weight ratio of 0 to less than 33.3%, along with a process for producing these electrolytes, which results in high ionic conductivity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymer electrolytes are used to achieve high ionic conductivity, then ionic conductivity is improved, but reliability deteriorates due to significant amounts of organic solvents
Solution Approach 1:
The invention changes the chemical composition parameters of the polymer electrolyte by incorporating specific polymers (polyacrylonitrile, polyvinylidene fluoride, polyvinyl chloride, polyvinyl acetate, polyvinyl pyrrolidone) and electrolyte salts (lithium halide, lithium perchlorate, lithium tetrafluoroborate, lithium hexafluorophosphate) in controlled ratios, eliminating the need for organic solvents while achieving high ionic conductivity and reliability
Solution Approach 2:
The invention creates a composite solid polymer electrolyte material by combining multiple polymer components with electrolyte salts in specific compositions, forming a new material system that achieves both high ionic conductivity and reliability without organic solvents
2Reliability
If gel-type polymer electrolytes are used to achieve high ionic conductivity, then ionic conductivity is improved, but liquid leakage resistance deteriorates
Solution Approach 1:
The invention extracts and removes organic solvents from the electrolyte system entirely, transitioning from gel-type to solid-type polymer electrolyte, thereby eliminating liquid leakage risks while maintaining high ionic conductivity through alternative polymer-salt composite structures
Solution Approach 2:
The invention changes the physical state parameter of the electrolyte from gel (containing solvent) to solid (solvent-free), achieving both improved liquid leakage resistance and maintained ionic conductivity through optimized polymer and electrolyte salt compositions
3Reliability
If all solid-type polymer electrolytes are used to improve reliability, then liquid leakage resistance is improved, but ionic conductivity deteriorates
Solution Approach 1:
The invention develops composite solid polymer electrolyte materials by combining multiple polymer components with electrolyte salts in specific ratios, creating a composite structure that enhances ionic conductivity while maintaining the solid-state reliability advantages
Solution Approach 2:
The invention optimizes the compositional parameters of the solid polymer electrolyte, including polymer type, electrolyte salt selection, and their ratios, to achieve high ionic conductivity in the solid-state without requiring organic solvents
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 electrolyte achieves high ionic conductivity and reliability, enabling excellent output characteristics and safety in electrochemical devices, such as lithium batteries and electric double layer capacitors, with reduced solvent content and improved mechanical strength.
Implementation Method 1
a polymer electrolyte with high ionic conductivity comprising a copolymer of an ethylenically unsaturated compound and carbon monoxide
Data Source
Figure 1
AI summary
A polymeric electrolyte comprising: a polymeric material and an electrolyte salt; or a polymeric material, a solvent and an electrolyte salt, wherein a copolymer composed of 50 to 99 mol% of an ethylenically unsaturated compound and 1 to 50 mol% of carbon monooxide comprises 66.7 to 100 wt% of the polymeric material.