Green hydrogen long-term storage is a critical enabler for the widespread adoption of renewable energy, addressing the seasonal and intermittent nature of sources like solar and wind. Produced via electrolysis using renewable electricity, green hydrogen can be stored for extended periods without significant energy loss, making it ideal for balancing supply and demand across months or even seasons. Technologies such as metal hydride storage, liquid organic hydrogen carriers (LOHCs), or underground salt caverns facilitate this long-term storage. Metal hydrides, for instance, chemically bond hydrogen to metals, allowing safe storage in compact units for years. This capability ensures that surplus green hydrogen generated during peak renewable production (e.g., summer solar) can be preserved and used during high-demand periods (e.g., winter heating). Long-term green hydrogen storage thus enhances energy security, reduces the need for fossil fuel backups, and accelerates the transition to a fully decarbonized energy system.
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