Tobias Janoschka | Jena Flow Batteries: How can you design a battery where you can upgrade its energy capacity without touching its power output?
08:30 - 10:09
Other snippets from this talk
Summary of the clip:
How can you design a battery where you can upgrade its energy capacity without touching its power output?
The key architectural feature of a flow battery is the decoupling of power and energy. Power output is determined by the size and number of the electrochemical cell stacks, while the total energy capacity is a direct function of the volume of electrolyte stored in the tanks. This separation is a fundamental design advantage over monolithic battery architectures.
This decoupling makes the system uniquely and cost-effectively scalable for long-duration storage applications. To increase a system's storage duration from 4 hours to 8 or 12 hours, one simply increases the size or number of electrolyte tanks. The power conversion system (the stacks) remains unchanged, allowing for precise and economical tailoring of the battery to the specific duty cycle of an application.
This modularity also extends to maintenance and repair. A flow battery is not a sealed, monolithic device but rather an industrial system of accessible subsystems like pumps, pipes, sensors, and stacks. If a single component fails—for example, one cell stack—it can be isolated, removed, and replaced without decommissioning the entire system or losing the valuable electrolyte, which remains safely in the tanks.
In this short video, you can learn:
* The principle of decoupled power and energy in flow batteries.
* How to independently scale storage duration by simply adding more electrolyte.
* The advantage of modular design for simplified maintenance and repair.
📋 **Clip Abstract** This segment details the unique architectural benefits of flow batteries, focusing on the independent scaling of power and energy. This modularity allows for cost-effective long-duration storage and simplifies maintenance, as individual components can be repaired or replaced without affecting the entire system.
🔗 Link in comments 👇
#FlowBatteryArchitecture, #PowerEnergyDecoupling, #ElectrolyteVolumeScaling, #ModularBatteryMaintenance, #LongDurationStorage, #GridEnergyStorage
This is a highlight of the presentation:
Metal-free flow batteries: intrinsically safe, long-life energy storage without scarce metals
More Highlights from the same talk.
05:43 - 08:01
What if you could build a grid-scale battery from the most abundant elements on Earth?
What if you could build a grid-scale battery from the most abundant elements on Earth?
In a metal-free or organic flow battery, the core principle of storing energy in two separate liquids is maintained. However, instead of using metal ions like vanadium, the active materials are organic salts dissolved in water. These aqueous electrolytes are stored in tanks and pumped through a cell stack where the electrochemical charging and discharging reactions occur, leveraging the advantages of the flow battery architecture with a novel chemistry.
The primary advantage of this approach is supply security. The speaker uses a periodic table to visually demonstrate that the building blocks of their organic molecules are carbon, hydrogen, and nitrogen—some of the most abundant and easily accessible elements on Earth. This fundamentally de-risks the supply chain compared to batteries that rely on geographically concentrated or scarce metals.
This material advantage is further enhanced by the choice of precursors. The specific organic molecules used are synthesized from industrial commodities like acetone and ammonia, which are already manufactured on an enormous global scale. By design, this technology avoids any reliance on critical battery metals such as lithium, cobalt, or even vanadium, ensuring a stable and scalable material pipeline for gigawatt-hour scale deployments.
In this short video, you can learn:
* The fundamental operating principle of an organic redox flow battery.
* Why using organic molecules provides inherent supply chain security.
* How the technology avoids reliance on critical battery metals like vanadium or lithium.
📋 **Clip Abstract** This clip explains the core concept of a metal-free organic flow battery, where energy is stored in water-based solutions of organic salts. The primary advantage highlighted is the use of materials derived from the most abundant elements on Earth, ensuring a secure and scalable supply chain.
🔗 Link in comments 👇
#OrganicFlowBattery, #AqueousOrganicElectrolyte, #MetalFreeBattery, #AbundantElements, #GridScaleStorage, #SupplyChainSecurity
17:35 - 18:21
Organic molecules can degrade, so how can you build a 20-year battery with them?
Organic molecules can degrade, so how can you build a 20-year battery with them?
A critical technical hurdle for organic flow batteries is ensuring the long-term chemical stability of the active molecules. Decomposition over time can lead to irreversible capacity fade, so molecule stability was a primary focus during the initial research and development phase. This is a well-known challenge that must be solved for the technology to be commercially viable.
The speaker explains that selecting the right molecule is a complex, multi-parameter optimization problem. The ideal candidate must not only be highly stable across many charge-discharge cycles but also possess good electrochemical potential (for high cell voltage), high solubility in water (for energy density), and be manufacturable at low cost from abundant precursors.
Through an extensive screening and design process, the company identified and selected organic molecules that successfully meet all of these demanding criteria. The result is a robust system chemistry that directly addresses the stability concerns. The speaker confidently states that their systems are designed for a 20-year operational lifetime, validating their choice of materials for long-duration energy storage applications.
In this short video, you can learn:
* The main challenge of ensuring long-term stability in organic active materials.
* The multi-faceted screening process for selecting optimal molecules (stability, voltage, solubility, cost).
* The resulting 20-year design lifetime of the selected organic flow battery system.
📋 **Clip Abstract** This clip directly addresses the critical technical challenge of long-term stability for the organic molecules used in the flow battery. The speaker confirms that after a rigorous screening process balancing stability, performance, and cost, they have developed a system with a design lifetime of 20 years.
🔗 Link in comments 👇
#OrganicFlowBatteries, #MolecularStability, #MoleculeScreening, #RedoxActiveOrganics, #LongDurationStorage, #GridScaleStorage