Environmentally friendly and low-toxic batteries come out

Researchers from Fudan University in China said on the 22nd that they have designed a fast-charging conceptual, environmentally friendly and low-toxic battery, which is expected to be used in energy storage such as wind and solar power generation and smart grid peak-to-valley load regulation in the future.

This result was published in the new issue of the American “Science Advances” magazine. Research leader and associate professor of Fudan University Wang Yonggang told Xinhua News Agency that the electrode materials or electrolytes of existing commercial batteries contain substances that are not friendly to the environment or even toxic. Therefore, they focused on choosing low-toxic and environmentally friendly materials in their design. Electrode material and electrolyte.

The positive electrode of the battery designed by Wang Yonggang and others is a neutral aqueous solution containing iodine ions, the negative electrode is a solid organic polymer polyimide electrode, and the electrolyte is a neutral aqueous solution containing lithium ions or sodium ions.

Wang Yonggang said that compared with existing batteries, the battery is less harmful to the environment. Since the positive and negative electrodes of traditional rechargeable batteries are all solid, and the positive and negative electrodes of traditional flow batteries are liquid solutions, this is a new type of battery system between traditional rechargeable batteries and traditional flow batteries

The battery also has the characteristics of high work efficiency, fast charge and discharge speed, long cycle life and high safety. Under the condition of high current charge and discharge, the battery can be recycled 50,000 times.

But Wang Yonggang also said that the disadvantage of the battery is its limited energy density, so it is only suitable for large-scale energy storage devices, such as wind energy, solar energy and other renewable energy storage, and is not suitable for existing mobile electronic equipment, such as mobile phones and laptop computers. , Electric cars, etc.