Composite Fiber Solid Electrolyte for Conductivity and Flexibility
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Solution Overview
Problem
Current secondary battery technologies face challenges in achieving high ionic conductivity, mechanical stability, flexibility, and long life, especially in varying temperature environments, while maintaining high charge/discharge capacity and operational reliability.
Innovation Solution
A solid electrolyte composed of bacterial cellulose and chitosan, with DNA, carboxyl, or DABCO groups bound to the surface, and functional fibers with piperidone as a backbone, forming a network that enhances ionic conductivity and thermal stability, allowing for operation in both low and high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid electrolyte is designed to achieve high ionic conductivity, then the charge/discharge capacity is improved, but the mechanical stability and flexibility deteriorate
Solution Approach 1:
The patent employs a composite fiber structure combining bacterial cellulose and chitosan, where bacterial cellulose provides mechanical strength and chitosan contributes to ionic conductivity. This composite approach allows the solid electrolyte to simultaneously achieve high ionic conductivity and mechanical stability, resolving the contradiction between these two properties.
Solution Approach 2:
The invention introduces functional groups (carboxyl, DABCO, piperidone) at specific locations on the fiber surfaces and within the matrix structure. These localized functional groups enhance ionic conductivity in specific regions without compromising the overall mechanical integrity of the fiber network, thus resolving the contradiction between local ionic conductivity and global mechanical stability.
2Reliability
If the solid electrolyte is optimized for high charge/discharge capacity, then the energy density is improved, but the operational life and reliability deteriorate
Solution Approach 1:
The dual-polymer composite structure of bacterial cellulose and chitosan provides both high ionic conductivity for charge/discharge capacity and structural stability for operational life. The synergistic combination allows the electrolyte to maintain performance over extended periods while delivering high capacity.
Solution Approach 2:
The patent modifies the chemical parameters of the fiber structure by introducing specific functional groups (carboxyl, DABCO, piperidone) that optimize ion transport properties. These parameter changes enhance charge/discharge capacity while the stable backbone structure of the composite fibers maintains long-term durability.
3Ease of operation
If the solid electrolyte is designed for flexibility, then the ease of operation is improved, but the mechanical strength and stability deteriorate
Solution Approach 1:
The patent utilizes a fibrous network structure with inherent flexibility that can be formed into thin film configurations. The bacterial cellulose-chitosan composite fibers provide both the flexibility needed for ease of operation and the mechanical strength through their network architecture and intermolecular interactions.
4Temperature
If the solid electrolyte is optimized for high-temperature operation, then the thermal stability is improved, but the ionic conductivity and charge/discharge capacity deteriorate
Solution Approach 1:
The patent introduces functional groups with specific thermal properties (DABCO, piperidone) that maintain structural integrity at high temperatures while preserving ion transport pathways. These parameter changes in the molecular structure allow the electrolyte to exhibit both thermal stability and sustained ionic conductivity across a wide temperature range.
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 solid electrolyte exhibits improved ionic conductivity, mechanical stability, and extended life, maintaining high charge/discharge capacity across a wide temperature range, ensuring reliable battery performance.
Implementation Method 1
DNA bound to a surface of the base composite fiber
Implementation Method 2
solid electrolyte having high reliability and high ionic conductivity
Implementation Method 3
base composite fiber including bacterial cellulose and chitosan
Data Source
AI summary
A solid electrolyte is provided. The solid electrolyte may comprise a base composite fiber including bacterial cellulose and chitosan, and DNA bound to the surface of the base composite fiber. Alternatively, a solid electrolyte comprises (a) a base composite fiber including bacterial cellulose and chitosan, and (b) a functional fiber having piperidone as a backbone.