Semi-Solid Battery 3D Coating for Uniform Gel Polymerization
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Solution Overview
Problem
Current semi-solid state batteries with conventional gel electrolytes face challenges in achieving uniform polymerization and maintaining excellent electrochemical performance due to uneven polymerization and blocked ion and electron conduction paths.
Innovation Solution
A semi-solid state battery design featuring a three-dimensional network structure coating on the cathode and/or anode plates, composed of a fiber material and an initiator, which anchors the initiator and controls the polymerization site, ensuring uniform gel electrolyte polymerization and preventing performance decay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gel electrolytes are used in semi-solid state batteries, then the electrolyte can replace traditional liquid electrolytes to avoid leakage and volatilization, but the polymerization inside the gel electrolyte is not uniform and the ion transmission path is blocked
Solution Approach 1:
The invention introduces a three-dimensional network structure coating containing initiators on the electrode plates, which segments the polymerization process into controlled local sites. This segmentation allows uniform polymerization throughout the gel electrolyte by distributing initiation points across the entire electrolyte volume, preventing the blockage of ion transmission paths while maintaining safety benefits.
Solution Approach 2:
The three-dimensional network structure coating provides localized initiator distribution at specific positions on the electrode plates. This local quality approach ensures that polymerization occurs uniformly from multiple controlled sites rather than randomly, achieving both safety and polymerization uniformity.
2Reliability
If conventional gel electrolytes are used in semi-solid state batteries, then the electrolyte can replace traditional liquid electrolytes to avoid leakage and volatilization, but the electron conduction between active materials is blocked causing rapid performance decay
Solution Approach 1:
By segmenting the polymerization process through distributed initiators on the three-dimensional network structure coating, the invention prevents excessive polymerization that would block electron conduction paths between active materials. This controlled segmentation maintains electron conduction while achieving uniform polymerization for safety.
Solution Approach 2:
The invention changes the polymerization parameters by controlling initiator distribution and concentration through the three-dimensional network structure coating. This parameter control ensures polymerization occurs at optimal levels that maintain both safety and electron conduction properties, preventing performance decay.
3Ease of manufacture
If initiators are not controlled in position, then the polymerization reaction occurs throughout the electrolyte volume, but the polymerization is uneven and ion transmission channels are blocked
Solution Approach 1:
The invention applies preliminary action by pre-installing the three-dimensional network structure coating with initiators on the electrode plates before electrolyte injection. This preliminary positioning of initiators ensures uniform polymerization when the polymerization reaction occurs, maintaining both manufacturing simplicity and polymerization uniformity.
Solution Approach 2:
The three-dimensional network structure coating acts as an intermediary that carries and positions initiators uniformly throughout the electrolyte system. This intermediary structure simplifies the manufacturing process while ensuring precise initiator distribution for uniform polymerization.
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 proposed solution achieves uniform polymerization of the gel electrolyte, enhancing electrochemical performance by maintaining ion and electron conductivity, resulting in improved specific capacity, electrical performance, and safety of the battery.
Implementation Method 1
A coating set on an electrode plate of the present disclosure comprises a fiber material, which can form a three-dimensional network structure on a surface of a battery plate, and anchor an initiator inside the three-dimensional network structure through hydrogen bond
Implementation Method 2
a monomer and a cross-linking agent for thermal polymerization are added to electrolyte precursor solution, which can be polymerized at an interface of a battery plate under an action of an initiator to form a gel electrolyte
Data Source
AI summary
A semi-solid state battery includes a cell and a gel electrolyte. The cell includes a cathode plate and an anode plate, in which a three-dimensional network structure coating is set on the cathode plate and/or the anode plate. Raw materials for preparing the three-dimensional network structure coating include a fiber material and an initiator. The gel electrolyte is condensed by a reaction of electrolyte precursor solution and the initiator. The electrolyte precursor solution includes a monomer and a cross-linking agent. A semi-solid state battery of this type has low resistance, high specific capacity, and good electrical performance and safety performance.