Dual-Electrolyte Battery Sealing With Solid Electrolyte Isolation
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Solution Overview
Problem
There is no specific structure proposed in existing solid-state batteries that uses a different type of electrolytic solution compatible with the positive electrode material and another type compatible with the negative electrode material, limiting the improvement of battery characteristics.
Innovation Solution
An electrical storage device is designed where a positive electrode is impregnated with a non-aqueous electrolytic solution and a negative electrode with an aqueous electrolytic solution, both sealed with a solid electrolyte to prevent mixing, allowing for different electrolytes to be used for each electrode, and the method involves forming these electrodes under reduced pressure to prevent damage from pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single type of electrolytic solution is used for both positive and negative electrodes, then the structure is simple, but the battery characteristics cannot be optimized for each electrode
Solution Approach 1:
The battery is divided into two separate sealed electrode units (positive electrode unit and negative electrode unit), each containing its own electrolytic solution. This segmentation allows independent optimization of electrolyte type for each electrode while maintaining overall system functionality.
Solution Approach 2:
A solid electrolyte layer acts as an intermediary barrier between the two liquid electrolytic solutions. This solid electrolyte prevents mixing of the electrolytes while still allowing ion transport, enabling the use of different electrolyte types without direct contact.
2Reliability
If different types of electrolytic solutions are used for positive and negative electrodes, then battery characteristics are improved, but the electrolytes may mix and cause adverse reactions
Solution Approach 1:
The battery structure is segmented into separate sealed compartments for positive and negative electrodes, physically isolating the different electrolytic solutions to prevent harmful mixing while maintaining individual electrode optimization.
Solution Approach 2:
The solid electrolyte serves as a protective intermediary layer that prevents direct contact between the incompatible liquid electrolytes, eliminating the risk of adverse chemical reactions while permitting necessary ion transfer.
3Adaptability or versatility
If electrodes are sealed entirely to prevent electrolyte mixing, then electrolyte compatibility is maintained, but pressure differences may cause damage
Solution Approach 1:
The sealing structure implements local quality control by creating sealed environments with specific pressure characteristics for each electrode unit. The sealed structure accommodates pressure differences through localized design features that maintain overall structural integrity.
Solution Approach 2:
The sealed electrode units are designed with beforehand cushioning features that accommodate pressure differences before they can cause damage. The structure includes provisions for pressure equalization or stress distribution that prevent structural failure under pressure differential conditions.
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
This configuration allows for improved battery characteristics by using distinct electrolytes for each electrode, reducing the size and weight of the device, and preventing damage from pressure differences, while facilitating ion transfer and enhancing battery performance.
Implementation Method 1
a solid electrolyte disposed between the first electrode and the second electrode. The first electrode is entirely sealed
Implementation Method 2
a positive electrode material and a negative electrode material are each impregnated with an electrolytic solution in which an electrolyte is dissolved in a solvent
Implementation Method 3
the first electrode and the second electrode each may have an internal pressure less than atmospheric pressure
Data Source
AI summary
To provide an electrical storage device in which a positive electrode material and a negative electrode material are each impregnated with a different type of electrolytic solution and a method for making the same. An electrical storage device (1) includes a negative electrode (2) including an organic electrolytic solution (21), a positive electrode (3) including an aqueous electrolytic solution (31), and a solid electrolyte (4) disposed between the negative electrode (2) and the positive electrode (3). The negative electrode (2) is entirely sealed. The electrical storage device (1) includes a sealing member (5), which is provided at the periphery of the negative electrode (2) and seals the negative electrode (2). The solid electrolytes (4) form a pair including a sealing material and together with the sealing member (5) seal the negative electrode (2) so that the negative electrode (2) is disposed between the solid electrolytes (4).