Organic Redox Flow Battery Using Quinone Electrolytes
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Solution Overview
Problem
Current redox flow batteries face challenges in achieving cost-effectiveness and sustainability due to the use of heavy metals and high material costs, with a need for eco-friendly solutions that can scale for grid-scale energy storage.
Innovation Solution
The development of an organic redox flow battery system utilizing quinones and hydroquinones as redox couples, with a polymer electrolyte membrane, that operates without heavy metals and volatile organic solvents, offering a scalable and cost-effective energy storage solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy metals (vanadium, chromium) are used in redox flow batteries, then energy storage performance is improved, but environmental friendliness and sustainability deteriorate
Solution Approach 1:
The patent replaces expensive and environmentally harmful heavy metals with inexpensive organic compounds (quinones, hydroquinones, phenols) that are biodegradable and environmentally benign. These organic redox couples achieve comparable energy storage performance while eliminating the environmental persistence and toxicity associated with metal-based systems.
Solution Approach 2:
The patent fundamentally changes the chemical composition parameter from inorganic metals to organic compounds, transforming the redox-active species from vanadium/chromium ions to quinone/hydroquinone molecules. This parameter change maintains electrochemical functionality while improving environmental compatibility and sustainability.
2Reliability
If conventional redox flow battery materials are used, then energy storage capability is achieved, but material cost increases
Solution Approach 1:
The patent employs inexpensive organic compounds derived from renewable resources (plant-based quinones, hydroquinones, phenols) as redox-active materials. These materials cost significantly less than vanadium or chromium-based systems while providing adequate energy storage capability for grid-scale applications.
Solution Approach 2:
The patent changes the material composition from expensive inorganic metals to inexpensive organic molecules, fundamentally altering the cost structure of the battery system. This parameter change enables economically viable grid-scale energy storage by reducing the levelized cost of energy storage.
3Reliability
If metal-based redox couples are used, then electrochemical performance is improved, but sustainability and renewability deteriorate
Solution Approach 1:
The patent transforms the redox-active species from non-renewable metal ions to renewable organic compounds that can be sustainably sourced from biomass and plant materials. This parameter change maintains electrochemical performance while achieving sustainability goals through renewable resource utilization.
Solution Approach 2:
The patent uses biodegradable organic compounds that can be replenished from renewable sources, contrasting with persistent metal materials. This approach achieves sustainability by using materials that naturally decompose and can be continuously regenerated from biomass resources.
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 provides a cost-effective and sustainable energy storage system with high discharge and charge rates, round-trip efficiency, and the ability to avoid the use of heavy metals, making it suitable for grid-scale applications.
Implementation Method 1
a polymer electrolyte membrane interposed between the positive electrode and the negative electrode
Implementation Method 2
The first organic compound is reduced during discharge while during charging the reduction product of the first organic compound is oxidized to the first organic compound
Data Source
AI summary
A flow battery includes a positive electrode, a positive electrode electrolyte, a negative electrode, a negative electrode electrolyte, and a polymer electrolyte membrane interposed between the positive electrode and the negative electrode. The positive electrode electrolyte includes water and a first redox couple. The first redox couple includes a first organic compound which includes a first moiety in conjugation with a second moiety. The first organic compound is reduced during discharge while during charging the reduction product of the first organic compound is oxidized to the first organic compound. The negative electrode electrolyte includes water and a second redox couple. The second couple includes a second organic compound including a first moiety in conjugation with a second moiety. The reduction product of the second organic compound is oxidized to the second organic compound during discharge.