Hermetically Sealed Capacitors With Ionic Liquid Cathodes
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Solution Overview
Problem
Hermetically sealed capacitors suffer from high leakage current issues, which are difficult to control in conventional manufacturing environments, limiting their reliability and performance, especially in applications with adverse environmental conditions.
Innovation Solution
Incorporating ionic liquid within the cathode layer of the capacitive element, which forms intermolecular bonds with the solid electrolyte, enhancing film integrity and reducing leakage current through improved interaction between the electrolyte and the solid electrolyte, and hermetically sealing the capacitor with the ionic liquid inside the casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hermetically sealed capacitors are manufactured without ionic liquid, then manufacturing process is simpler, but leakage current is high and reliability is poor
Solution Approach 1:
Ionic liquid serves as an intermediary substance between the solid electrolyte and the cathode conductive layer. It forms intermolecular bonds with the solid electrolyte to enhance film integrity while maintaining electrical conductivity, thereby reducing leakage current without fundamentally changing the manufacturing process
Solution Approach 2:
The invention changes the physical and chemical parameters of the cathode structure by incorporating ionic liquid with specific properties (high ionic conductivity, appropriate viscosity, stable chemical composition). This parameter change improves the interaction between electrolyte and solid electrolyte, reducing leakage current while maintaining manufacturing feasibility
2Reliability
If humidification process is used to mitigate leakage current, then leakage current performance improves, but manufacturing control becomes difficult
Solution Approach 1:
Instead of using a complex and difficult-to-control humidification process, the invention employs a simple ionic liquid treatment that can be applied as a coating or solution. This approach achieves the desired leakage current reduction without requiring precise control of environmental humidity conditions during manufacturing
Solution Approach 2:
The invention changes the approach from controlling environmental humidity parameters to incorporating ionic liquid with specific physical-chemical parameters (ionic conductivity, viscosity, molecular structure) that directly improve film integrity and reduce leakage current in a controllable manner
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 use of ionic liquid in the cathode layer significantly reduces leakage current and improves the reliability and performance of hermetically sealed capacitors, leading to better aging characteristics and electric characteristics of finished capacitors.
Implementation Method 1
Incorporating ionic liquid within the cathode layer of the capacitive element, which forms intermolecular bonds with the solid electrolyte, enhancing film integrity and reducing leakage current through improved interaction between the electrolyte and the solid electrolyte
Data Source
AI summary
Provided is an improved capacitor and a method of making an improved capacitor. The capacitor comprises a hermetically sealed casing with a capacitive element in the hermetically sealed casing. The capacitive element comprises a cathode with an ionic liquid in the cathode.