Dual-Electrolyte Electrochemical Cells With Isolated Electrode Chambers
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Solution Overview
Problem
Conventional electrochemical cells face challenges in optimizing the properties of electrodes due to the use of a single electrolyte, which requires compatibility between both electrodes, limiting independent optimization and leading to issues such as chemical homogenization, solvent leaks, and safety risks.
Innovation Solution
The implementation of dual electrolytes, where the catholyte and anolyte are optimized separately, with a separator that fluidically isolates them while allowing ion passage, and the inclusion of degassing ports to manage gas buildup during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single electrolyte is used in conventional electrochemical cells, then the cell structure is simpler and easier to manufacture, but the electrode properties cannot be independently optimized and chemical homogenization occurs
Solution Approach 1:
The cell is divided into two separate electrolyte chambers (anolyte chamber and catholyte chamber) that are fluidically isolated from each other by the separator. This segmentation allows independent optimization of the anolyte and catholyte for their respective electrodes while maintaining a relatively simple overall cell structure.
Solution Approach 2:
A separator is introduced as an intermediary component between the anolyte and catholyte. This separator provides fluidic isolation to prevent mixing of the two electrolytes, while still allowing ionic conduction to maintain electrical connectivity. The intermediary enables independent electrolyte optimization without requiring complex manufacturing.
2Device complexity
If a single electrolyte is used to simplify cell construction, then manufacturing is easier, but safety risks increase due to solvent leaks and chemical incompatibility
Solution Approach 1:
The electrolyte system is segmented into two isolated chambers, preventing the chemical incompatibility and solvent leak issues associated with using a single electrolyte that must compromise between electrode requirements. Each electrolyte can be independently selected for optimal safety and performance.
Solution Approach 2:
The separator acts as a safety intermediary that physically isolates the anolyte and catholyte, preventing harmful chemical reactions and solvent mixing. This intermediary maintains safety while allowing the cell construction to remain relatively simple.
3Device complexity
If both electrodes must be compatible with the same electrolyte, then the cell structure remains simple, but electrode performance is compromised
Solution Approach 1:
The electrolyte system is segmented into two independent systems, allowing each electrode to be optimized for its specific electrolyte without compromise. The anode can be optimized for anolyte compatibility while the cathode is optimized for catholyte compatibility, achieving high manufacturing precision.
Solution Approach 2:
The separator serves as an intermediary that enables the use of different electrolytes on each side while maintaining a simple overall cell structure. It provides the necessary isolation to achieve electrode optimization without increasing device complexity.
4Device complexity
If gas builds up in electrodes during manufacture, then the cell requires additional components for gas management, but without it safety risks increase
Solution Approach 1:
Gas management functionality is extracted from the main cell body and implemented through separate degassing ports in the anode and cathode current collectors. This allows gas to be vented from each electrolyte chamber independently, managing the harmful gas buildup effect while minimizing additional cell components.
Solution Approach 2:
The degassing ports serve as intermediary components that provide a controlled pathway for gas removal from each electrolyte chamber. These intermediaries manage the gas buildup hazard without requiring complex additional safety systems.
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 approach enhances electrode optimization, reduces safety risks, and minimizes solvent leakage, leading to improved performance and safety in electrochemical cells.
Implementation Method 1
the separator can fluidically isolate the anolyte from the catholyte, while still allowing the passage of ions between the anode and cathode
Implementation Method 2
a cathode degassing port configured to release gas built up in the cathode during manufacture, and an anode degassing port configured to release gas built up in the anode during manufacture
Data Source
AI summary
Embodiments described herein relate generally to electrochemical cells having dual electrolytes, systems of such electrochemical cells, and methods for manufacturing the same. In some embodiments, electrochemical cells can include a cathode disposed on a cathode current collector, an anode disposed on an anode current collector, and a separator disposed therebetween. In some embodiments, the separator can include materials that fluidically and/or chemically isolate the anode from the cathode. In some embodiments, the cathode and/or anode can include a slurry of an active material and a conductive material in a liquid electrolyte. In some embodiments, the anode can be fluidically coupled to an anode degassing port. In some embodiments, the cathode can be fluidically coupled to a cathode degassing port.