Japan unveils paper-thin battery technology at Expo 2025

At Osaka Expo 2025, Japan unveiled ultra-thin perovskite batteries, with the ambition of regaining the leading position in the solar energy industry from China.



At a bus stop outside Expo 2025 in Osaka, Japan, ultra-thin and ultra-light perovskite solar cell technology is quietly on display.

This type of battery can be applied to domes, walls or glass - places where traditional silicon batteries cannot be applied.

Unlike Chinese technology, perovskite batteries use iodine as a raw material, which Japan and Chile currently hold the majority of the market share.

In the lab, perovskite cells have achieved efficiencies of nearly 30%, outperforming most silicon cells today.

Once holding 50% of the global solar panel market share in 2000, Japan now has less than 1% due to being overwhelmed by China in terms of price.

Learning from experience, the Japanese government has provided billions of dollars in support to companies like Sekisui Chemical to mass produce perovskite batteries.

The goal is to reach 20GW of capacity from new generation batteries by 2040, equal to 20 nuclear power plants.

However, the biggest challenge is still the cost: Japan hopes to reduce it to 10 yen/kWh, but it is still 5 times more expensive than current Chinese batteries.

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Source: https://khoahocdoisong.vn/nhat-ban-tung-cong-nghe-pin-mong-nhu-giay-tai-expo-2025-post1557063.html