Manganese Redox Flow Battery Electrolyte Design
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Solution Overview
Problem
Existing flow batteries are costly due to the use of expensive reactants and require complex structures with separate circuits and membranes for ion exchange, which increases production costs.
Innovation Solution
A flow battery design utilizing manganese in both anodic and cathodic half-cells with an electrolyte containing a specific salt formula [cat]2[MnHal_n] and an organic solvent, where manganese separates in the anodic half-cell and is deposited on electrodes, eliminating the need for a second reactant and membrane, and allowing for a hybrid configuration that reduces costs and simplifies structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If expensive reactants and separate circuits with membranes are used in flow batteries, then energy storage capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the anodic and cathodic reactants into a single manganese-based system. Both half-cells use manganese compounds (Mn2+ in anolyte, Mn3+/Mn4+ in catholyte), eliminating the need for separate expensive reactant circuits and reducing material costs while maintaining energy storage capability
Solution Approach 2:
The patent extracts and eliminates the membrane component from the battery structure. By using manganese-based reactants with different oxidation states that can be distinguished without a membrane, the design removes this costly and complex component while still achieving effective separation of reactant circuits
2Productivity
If membranes and separate circuits are used for ion exchange, then ion exchange efficiency is improved, but device complexity increases
Solution Approach 1:
The patent removes the membrane component entirely from the battery design. The manganese-based system allows for effective ion exchange and reactant separation through alternative means, significantly simplifying the overall device structure while maintaining operational efficiency
Solution Approach 2:
The manganese-based electrolyte system performs multiple functions: it provides the reactants for both half-cells, enables ion exchange, and allows for oxidation state differentiation without requiring separate specialized components for each function
3Reliability
If multiple different reactants are used in anodic and cathodic half-cells, then electrochemical performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the reactant systems of both half-cells into a unified manganese-based chemistry. The anolyte contains Mn2+ and the catholyte contains Mn3+/Mn4+, both derived from the same elemental source, which maintains electrochemical performance while dramatically reducing material costs compared to using entirely different reactant systems
Solution Approach 2:
The patent utilizes different oxidation states of the same element (manganese) to create the electrochemical potential difference. By changing the oxidation state parameter rather than changing the elemental identity, the system achieves the required electrochemical performance at lower cost
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 manganese as the sole reactant in both forms (solid and dissolved) in the flow battery lowers manufacturing costs, eliminates the need for pumps and membranes, and achieves efficient energy storage with a potential range of 1.5 to 4.5V and charging efficiency of up to 75%, while stabilizing manganese oxidation states to prevent electrolyte decomposition.
Implementation Method 1
Flow batteries, also known as redox flow batteries or more commonly as redox flow batteries (RFB), are a specific embodiment of an accumulator. A flow battery stores electrical energy in chemical compounds.
Implementation Method 2
In the charged state of the flow battery according to the invention, the anodic half-cell contains elemental manganese in oxidation state 0 (zero), which is oxidized to a manganese compound in oxidation state +II.
Data Source
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AI summary
To solve the problem of providing a redox flow battery that can be manufactured in a simple and cost-effective manner, such a battery is proposed comprising an anode half-cell (20) with manganese in an oxidation state less than or equal to +II, and comprising a cathode half-cell (22) with manganese in an oxidation state greater than +II, wherein the oxidation states of the manganese in the anode half-cell (20) and in the cathode half-cell (22) are different when the battery is charged.