Windable Solid Polymer Electrolyte Structure for Flexible Batteries
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Solution Overview
Problem
Current solid-state secondary batteries are not windable, limiting their flexibility and practical application, and existing solutions for flexible batteries do not fully address the issues of leakage and explosion risks associated with liquid electrolytes.
Innovation Solution
A secondary battery structure featuring a windable flexible polymer matrix solid electrolyte is developed using non-woven technology, where a cloth solid electrolyte is electroplated with positive and negative electrodes and subjected to a heat treatment process to form carbonized layers, enabling the battery to be bent and wound while preventing leakage and explosion risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid electrolyte is used in secondary batteries, then charge/discharge efficiency is improved, but leakage and explosion risks increase
Solution Approach 1:
The patent changes the physical state of the electrolyte from liquid to solid polymer matrix, fundamentally altering the safety parameters while maintaining ionic conductivity. The solid polymer electrolyte eliminates leakage risks inherent in liquid electrolytes while providing a stable structure that prevents explosion hazards.
Solution Approach 2:
The patent employs a composite structure consisting of polymer matrix, ceramic particles, and carbonized layers. This multi-component composite material combines the flexibility and processability of polymers with the ionic conductivity of ceramics and the protective properties of carbonized layers, achieving both high charge/discharge efficiency and enhanced safety.
2Reliability
If solid electrolyte is used to prevent leakage and explosion, then safety is improved, but flexibility and windability are lost
Solution Approach 1:
The patent utilizes a flexible polymer matrix as the solid electrolyte base, which inherently provides bendability and windability. The polymer structure allows the battery to be formed into various shapes and sizes, including wound configurations, while maintaining the safety advantages of solid electrolytes.
Solution Approach 2:
The patent incorporates porous ceramic particles within the polymer matrix, creating a three-dimensional network structure. This porous architecture provides ion transport pathways while maintaining the flexibility of the polymer, enabling both safety and adaptability.
3Strength
If non-woven fabric is used to reinforce solid-state electrolyte membrane, then mechanical strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the electrolyte formation and protective layer formation into a single heat treatment process. The carbonized layer is formed in-situ during the electrolyte preparation process, eliminating the need for separate coating and curing steps, thereby simplifying manufacturing while providing both mechanical strength and protection.
Solution Approach 2:
The patent employs a self-assembling approach where the carbonized protective layer forms automatically during the heat treatment of the electrolyte. The system self-organizes to create the necessary protective structure without requiring additional manufacturing steps or complex equipment.
4Reliability
If heat treatment is applied to form carbonized layers, then protective function is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes the heat treatment parameters (temperature, time, atmosphere) to achieve the desired carbonized layer with minimum energy input. By precisely controlling these parameters, the process forms an effective protective layer while minimizing energy consumption and avoiding excessive heating.
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 solution allows for a non-toxic, high-temperature-resistant, and rapidly chargeable and dischargeable battery that can be flexibly used, overcoming the limitations of existing solid-state batteries by utilizing a macromolecular-based solid electrolyte and preventing dendrite formation.
Implementation Method 1
electroplating a positive electrode on a first side of a cloth solid electrolyte; electroplating a negative electrode on a second side opposite to the first side of the cloth solid electrolyte
Implementation Method 2
conducting a heat treatment process to form a first carbonized layer between the positive electrode and the cloth solid electrolyte and a second carbonized layer between the negative electrode and the cloth solid electrolyte
Data Source
AI summary
The present invention relates to a secondary battery structure having a windable flexible polymer matrix solid electrolyte and a manufacturing method thereof. The manufacturing method comprises the steps of electroplating a positive electrode on a first side of a cloth solid electrolyte; then electroplating a negative electrode on a second side opposite to the first side of the cloth solid electrolyte; and conducting a heat treatment process to form a first carbonized layer between the positive electrode and the cloth solid electrolyte, and a second carbonized layer between the negative electrode and the cloth solid electrolyte.