This giant underground battery is a $1-billion clean energy solution

• California’s San Joaquin Valley will soon host the world’s largest compressed-air energy storage project, a $775-million initiative signed for 25 years.
• This project aims to help transition from fossil fuels to renewable energy, maintaining power supply even when solar and wind aren’t available.
• The technology stores excess energy by compressing air in underground caverns, then releasing it to generate electricity as needed.
• We have developed this method that offers a long-lasting and potentially more environmentally friendly alternative to lithium-ion batteries, though it still faces regulatory and environmental hurdles. 

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