Solid Polymer Electrolyte Block Chain Structure

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing solid polymer electrolytes lack satisfactory thermal characteristics, physical characteristics, and ionic conductivity, and adhesive materials used for cell separators face challenges in maintaining adhesive strength and imparting electrolyte properties with ionic conductivity.

Innovation Solution

Development of novel polymers and crosslinked polymers with specific block chain structures and crosslinking agents, such as polyisocyanate and polyepoxy compounds, to create compositions for solid polymer electrolytes that exhibit improved thermal, physical, and ionic conductivity properties, while maintaining adhesive capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional solid polymer electrolytes are used, then they can provide basic electrolyte function, but they lack satisfactory thermal characteristics, physical characteristics, and ionic conductivity

Engineering Contradiction:

Improvethermal characteristicsVSAvoidpolymer structure complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The polymer is divided into distinct block chains: polyalkylene oxide blocks (providing ionic conductivity) and polar monomer blocks (providing thermal stability and crosslinking sites). This segmentation allows each block to contribute its specific properties to the overall electrolyte performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention creates a composite polymer structure combining different functional blocks: polyalkylene oxide units for ion transport, polar monomers for structural stability, and crosslinking agents for enhanced mechanical properties. This composite approach resolves the contradiction by integrating multiple functions into a single material system.

Inventive Principle:

Principle #40Composite materials

2Reliability

If adhesive materials are used for cell separators, then they can provide joining function, but they face challenges in maintaining adhesive strength and imparting electrolyte properties with ionic conductivity

Engineering Contradiction:

Improveadhesive strengthVSAvoidelectrolyte properties

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The polymer composition serves multiple functions simultaneously: the polyalkylene oxide blocks provide ionic conductivity for electrolyte function, the polar monomer blocks provide adhesive properties through crosslinking, and the overall structure maintains mechanical integrity. This multi-functionality eliminates the need for separate adhesive and electrolyte materials.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention merges the functions of adhesive materials and electrolyte materials into a single polymer composition. The crosslinked polymer matrix provides both adhesive strength for cell separator joining and ionic conductivity for electrolyte operation, resolving the contradiction between these two requirements.

Inventive Principle:

Principle #5Merging (Combining)

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 resulting solid polymer electrolytes demonstrate excellent thermal characteristics, physical characteristics, and ionic conductivity, and the crosslinked polymers show enhanced adhesive performance, suitable for applications in electrochemical devices and fixing agents.

Implementation Method 1

crosslinked polymers which are obtained by the reaction between the polymer and crosslinking agent

Methodology Applied

Scientific EffectCrosslinking reaction: Chemical Bonding

Implementation Method 2

solid polymer electrolyte which is formed from a matrix component of a crosslinked polymer and electrolyte salt

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS7645830B2Polymer, crosslinked polymer, composition for solid polymer electrolyte, solid polymer electrolyte, and adhesive composition

Publication Date: 2010.01.12 NIPPON SODA CO LTD

AI summary

A polymer including a block chain A which is formed from a random copolymer containing a repeating unit (I) represented by the formula (I)wherein R1 to R3 each independently represents hydrogen or C1-10 hydrocarbon and R1 and R3 may bond to form a ring; R4a and R4b each independently represents hydrogen or methyl; R5 represents hydrogen, hydrocarbon, acyl, or silyl; and m represents any integer of 1 to 100 and when m is 2 or more and each R4a may be the same or different from one another and each R4b may be the same or different from one another; and a repeating unit (II) represented by the formula (II)wherein R6 and R8 each independently represents hydrogen or C1-10 hydrocarbon and R6 and R8 may bond to form a ring; R7 represents hydrogen, C1-10 hydrocarbon, hydroxyl, hydrocarbonoxy, carboxyl, acid anhydride, amino, ester, or an organic group having at least one functional group selected from the group consisting of hydroxyl, carboxyl, epoxy, acid anhydride, and amino; and R9 represents an organic group having at least one functional group selected from the group consisting of hydroxyl, carboxyl, epoxy, acid anhydride, and amino; anda block chain B having a repeating unit (III) represented by the formula (III)wherein R10 to R12 each independently represents hydrogen or C1-10 hydrocarbon and R13 represents aryl or heteroaryl; andwherein an arrangement order thereof is B, A, B.