Membraneless Electrochemical Cells With Single-Electrolyte Separation
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Solution Overview
Problem
Conventional liquid batteries require multiple electrolyte solutions separated by membranes or salt bridges, which are costly and prone to degradation, limiting their efficiency and durability.
Innovation Solution
The development of electrochemical cells and batteries that operate with a single electrolyte solution, utilizing a porous non-conductive spacer between the anode and cathode current collector to prevent physical contact and maintain separation, eliminating the need for membranes or salt bridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If membranes or salt bridges are used to separate electrolyte solutions, then the half-cells are protected from direct chemical reaction, but the cost increases and the components degrade over time
Solution Approach 1:
The patent removes the membrane or salt bridge from the electrochemical cell design. Instead of using these separation components, the invention employs a single electrolyte solution that直接接触 both electrodes, eliminating the need for degradation-prone separation mechanisms while maintaining cell protection through alternative means.
Solution Approach 2:
The invention merges the electrolyte solutions into a single unified solution that serves both the anode and cathode compartments. This consolidation eliminates the need for separate electrolyte containers and separation components, reducing overall system complexity and cost while maintaining electrochemical functionality.
2Reliability
If membranes are used to prevent shorting and separate electrolyte solutions, then electrical isolation is achieved, but the cost increases and the membranes readily degrade
Solution Approach 1:
The patent extracts and removes the membrane component entirely from the system. Electrical isolation and shorting prevention are achieved through the geometric arrangement of electrodes and conductive pathways rather than through a physical membrane barrier, thereby eliminating the degradation issue associated with membranes.
Solution Approach 2:
The invention introduces a non-conductive spacer as an intermediary element between the electrodes. This spacer maintains physical separation and prevents direct electrical contact (shorting) without requiring a degradable membrane, thus extending system lifespan while maintaining electrical isolation.
3Device complexity
If multiple electrolyte solutions are used in membraneless cells, then separation is achieved without membranes, but the solutions must be immiscible which limits design options
Solution Approach 1:
The invention combines multiple electrolyte functions into a single miscible electrolyte solution. This unified approach allows the use of common, well-understood electrolyte chemistries without requiring immiscibility constraints, thereby maintaining design flexibility and adaptability while still achieving membraneless operation.
Solution Approach 2:
The single electrolyte solution performs multiple functions simultaneously: it serves as the ionic conductor for both half-cells, maintains charge balance, and eliminates the need for separation mechanisms. This multi-functionality broadens design options compared to systems requiring immiscible electrolytes.
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 design enhances the efficiency and cost-effectiveness of electrochemical cells and batteries by allowing them to supply electricity and hydrogen without the need for expensive separation mechanisms, while maintaining the integrity and longevity of the cells.
Implementation Method 1
a porous non-conductive spacer between the anode and the cathode current collector
Implementation Method 2
an electrochemical cell must also allow for the passage of ions
Implementation Method 3
The electrodes of the two-half cells are placed in electrical contact to allow for current to flow
Implementation Method 4
Oxidation occurs on the anode side of the cell
Implementation Method 5
reduction on the cathode side
Data Source
AI summary
Electrochemical cells and batteries that can operate with a single electrolyte solution, such as those comprising an anode, a cathode current collector, and a porous, non-conductive spacer between the cathode current collector and anode. Membraneless electrochemical cells and batteries are also disclosed. The electrochemical cells and batteries disclosed herein may be used, for example, to produce electricity or to generate hydrogen or both, and to deliver electricity or hydrogen or both to process applications.