Long-duration energy storage (LDES) systems, generally defined as storing eight or more hours of energy, are widely expected to be necessary to reach energy transition goals. Flexible forms of fossil fuel energy, such as gas peaking plants, are currently used to manage the intermittent peaks and troughs of renewable energy generation. However, these will need to be replaced with a zero-carbon alternative. Everoze partner David Thomason investigates the alternatives to lithium-ion (li-ion) batteries that may provide long-duration services.
A 100 MW/400 MWh compressed air storage project in China. While it can offer low-cost energy storage, compressed air is reliant on salt caverns or similar geographical features, making it a relatively rare opportunity.
Photo: Chinese Academy of Sciences
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