Flow batteries generally have lower energy density compared to lithium-ion batteries. Here’s a breakdown of their energy densities:
- Flow Batteries: These batteries typically have an energy density ranging from 30 to 100 Wh/kg. The most commonly used vanadium flow batteries have an energy density of about 30 Wh/L. This makes them less suitable for applications where space is critical.
- Lithium-ion Batteries: They boast a much higher energy density, often exceeding 200 Wh/kg. This high energy density makes lithium-ion batteries ideal for applications like electric vehicles and portable devices where space and weight are significant factors.
Despite the lower energy density, flow batteries have advantages in cycle life, safety, and environmental impact, making them valuable for certain energy storage applications, such as grid-scale energy backup systems.
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