1.5V rechargeable battery

Research Center Jülich in Germany develops 1.5V rechargeable battery that can be fully charged in less than an hour

Researchers at the Jülich Research Center (FZ Jülich) in Germany have found a way to quickly charge solid-state batteries. They showed that their concept can make the charging current ten times higher than before. The key is to choose materials that have always been very compatible.

In this way, 1.5V rechargeable battery materials can work well together both chemically and mechanically. According to researchers at the Jülich Research Center, all components of the 1.5V rechargeable battery are made of different phosphate compounds.

Dr. Hermann Tempel, group leader of the Institute for Energy and Environment (IEK-9) at the Jülich Research Center, explained: "In order to allow the largest possible current to pass through the boundaries of the battery layer, we use very similar materials to produce all battery components. The battery anode, cathode and electrolyte are all made of different phosphate compounds, which can make the charging power greater than 3C (about 50mAh/g), which is 10 times higher than the power found in the literature."

The battery designed by the researchers can be fully charged in less than an hour. Their method solves the biggest obstacle of solid-state batteries-low current, which is why solid-state batteries generally take 10 to 12 hours to fully charge. Tempel added: "We have applied for a patent for our concept battery, which uses a favorable combination of materials to shorten the charging time."

The materials used in the concept battery are reasonably priced and relatively easy to process. In addition, the researchers say that this new 1.5V rechargeable battery is basically free of toxic substances. However, this is just the beginning. Dr. Shicheng Yu said: "In early tests, the new battery was very stable over 500 charge and discharge cycles, and 84% of the original battery capacity was retained. A capacity loss of less than 1% is feasible." Researchers at the Jülich Research Center will further improve this fast-charging 1.5V rechargeable battery in the future.

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