Zwitterionic organic frameworks for solid-state secondary battery, electrolyte including same, and all-solid-state secondary battery including same
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Solution Overview
Problem
Existing solid electrolytes for all-solid-state secondary batteries face challenges in achieving high ion conductivity and thermal/electrochemical stability, particularly at room temperature, with inorganic electrolytes being difficult to manufacture and process, and organic electrolytes having low conductivity and stability issues.
Innovation Solution
A zwitterion organic framework with a covalent bond and zwitterion structure is developed, featuring a crystalline organic skeleton with a cationic nitrogen ring and anionic functional groups, which forms a stable electrolyte with high lithium-ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic solid electrolyte is used, then electrochemical stability is improved, but manufacturing difficulty increases and contact resistance increases
Solution Approach 1:
The patent employs a composite structure combining organic framework components (e.g., imidazolium rings, carboxylate groups) with zwitterionic moieties to create a hybrid electrolyte material that achieves both high ionic conductivity and electrochemical stability, overcoming the limitations of purely inorganic or organic electrolytes
2Ease of manufacture
If organic solid electrolyte based on amorphous polymer is used, then ease of manufacture is improved, but ionic conductivity deteriorates and thermal stability deteriorates
Solution Approach 1:
The patent changes the structural parameters of the organic electrolyte by introducing crystalline frameworks with specific pore sizes and channels, transforming the amorphous polymer structure into an ordered crystalline structure that enhances ionic conductivity while maintaining ease of manufacture through solution processing
3Ease of operation
If polymer-based electrolyte is used, then ease of manufacture is worsened due to complicated process, but flexibility is improved
Solution Approach 1:
The patent segments the electrolyte into modular functional units (imidazolium rings, carboxylate groups, zwitterionic moieties) that can be synthesized independently and then assembled, simplifying the manufacturing process while maintaining the flexible polymer-based structure
4Reliability
If inorganic solid electrolyte is used, then electrochemical stability is improved, but processing difficulty increases
Solution Approach 1:
The patent uses an organic framework as an intermediary material that bridges the gap between inorganic and organic electrolytes, providing the electrochemical stability of inorganic materials while enabling the ease of processing characteristic of organic materials through solution-based fabrication methods
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 zwitterion organic framework provides excellent lithium-ion conductivity and stability at room temperature, with a simple synthesis process and high yield, resulting in improved cycling performance and energy density for all-solid lithium metal secondary batteries.
Implementation Method 1
the organic skeleton has crystallinity... excellent lithium-ion conductivity
Data Source
AI summary
Provided is a zwitterion organic framework for an all-solid-state secondary battery, and more specifically, a zwitterion organic framework for an all-solid-state secondary battery wherein the zwitterion organic framework is an organic framework, comprises a covalent bond and has a zwitterion structure.