Scientists create solar-powered energy storage using balsa wood

Scientists have achieved a groundbreaking milestone in sustainable technology by transforming balsa wood into a powerful solar energy storage device.

According to a study published in Advanced Energy Materials in March 2026, a research team led by Yang Meng created a wood-based composite that functions as an efficient solar thermal harvester.

Unlike traditional methods that require intensive high-temperature processing, this new technique preserves the natural structure of balsa wood, making it both eco-friendly and scalable.

These channels are infused with stearic acid, which captures sunlight and stores it as heat.

This material achieves an impressive 91.27% photothermal efficiency and can even generate electricity after dark using an attached thermoelectric generator.

Furthermore, the material is durable, fire-resistant, and self-cleaning.

Because balsa wood naturally features an ideal architecture for this task, this innovation is easier to manufacture than synthetic alternatives.

This development offers a promising, cost-effective solution to the challenge of solar energy storage, providing a sustainable way to bridge the gap between daytime power production and nighttime energy consumption.