Dynamic Electrolyte Flow Configuration for Metal-Halogen Flow Battery
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Solution Overview
Problem
Existing flow batteries for off-peak energy storage face challenges in achieving optimal electrolyte pathway configurations, leading to issues with metal plating morphology, corrosion rates, and voltaic efficiency.
Innovation Solution
The implementation of a metal-halogen flow battery system with a sealed container and a closed loop circuit using liquefied halogen reactants like chlorine, where the electrolyte and halogen reactant circulate through the same flow path without separation, and the use of different electrolyte flow configurations in charge and discharge modes to improve metal plating and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single electrolyte flow configuration is used for both charge and discharge modes, then the device complexity is reduced, but the metal plating morphology and voltaic efficiency deteriorate
Solution Approach 1:
The patent implements dynamic electrolyte flow configuration that changes between charge and discharge modes. During charge mode, the electrolyte flows in a first configuration optimized for metal deposition, while during discharge mode, it flows in a second configuration optimized for metal dissolution and electrical contact. This dynamic switching resolves the contradiction by allowing optimal performance in both modes without requiring permanent structural complexity.
Solution Approach 2:
The system employs periodic switching between two distinct electrolyte flow configurations synchronized with the charge-discharge cycles. The flow configuration is reversed or changed periodically according to operational mode, enabling the system to achieve optimal metal plating morphology during charging and optimal voltaic efficiency during discharging, thereby resolving the trade-off between simplicity and performance.
2Device complexity
If the electrolyte flows through the same path for both charge and discharge, then the device complexity is reduced, but the corrosion rate increases
Solution Approach 1:
The patent employs dynamic flow path configuration where the electrolyte circulation pattern changes between charge and discharge modes. During charge mode, the flow path is optimized for metal deposition with reduced corrosive exposure, while during discharge mode, the flow path ensures proper electrical contact and controlled dissolution. This dynamic switching reduces overall corrosion rates compared to a static single-path configuration.
3Reliability
If different electrolyte flow configurations are used for charge and discharge modes, then the metal plating morphology and voltaic efficiency improve, but the device complexity increases
Solution Approach 1:
The system achieves improved voltaic efficiency and metal plating morphology through dynamic flow configuration switching. The complexity is managed by using a single electrolyte circulation system that changes its flow pattern based on operational mode, rather than requiring completely separate systems for charge and discharge. This approach balances performance improvement with acceptable device complexity.
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 enhances metal plating morphology, reduces corrosion, and increases voltaic and coulombic efficiency, providing a more reliable and cost-effective energy storage solution.
Implementation Method 1
The electrolyte is circulated between the electrode area and a reservoir area
Implementation Method 2
uses a halogen component for reduction at a normally positive electrode
Implementation Method 3
an oxidizable metal adapted to become oxidized at a normally negative electrode during the normal operation of the electrochemical system
Data Source
AI summary
A flow battery and method of operating a flow battery. The flow battery includes a first electrode, a second electrode and a reaction zone located between the first electrode and the second electrode. The flow battery is configured with a first electrolyte flow configuration in charge mode and a second flow configuration in discharge mode. The first electrolyte flow configuration is at least partially different from the second electrolyte flow configuration.