An innovative solid-state battery from NASA. Free Technical Library News

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NASA's innovative solid-state battery

17.10.2022

Researchers at the US National Aeronautics and Space Administration (NASA) working under the Solid-state Architecture Batteries for Enhanced Rechargeability and Safety (SABERS) project have made progress in developing an innovative battery that is easier, more efficient and more efficient to use. now in industry. We are talking about a solid-state battery, which is significantly superior in performance to lithium counterparts.

Battery performance is a key aspect in the development of sustainable modes of transport such as electric aircraft. Batteries must store a lot of the energy needed to power the aircraft, while being light in weight and discharging at a certain rate.

To create such a battery, SABERS used innovative materials that were not previously used in this area. As a result, researchers have made significant progress. Over the past year, they have been able to increase the battery's rate of discharge, first by a factor of ten and then by another factor of five, bringing development closer to the goal of building a battery to power an aircraft.

The use of innovative materials has also enabled a number of changes to be made to the design and packaging of solid-state batteries. This helped reduce their mass and increase their capacity. Instead of placing each individual battery cell in a separate steel case, as is the case with lithium batteries, all SABERS battery cells can be stacked vertically inside one case. Using this approach, the researchers clearly showed that solid-state batteries can power cars with 500 Wh/kg, twice as much as today's electric vehicles.

“This design not only eliminates 30-40% of the mass of the battery, but also allows us to double or even triple the energy that it can store, which is far beyond the capabilities of lithium batteries, which are considered cutting-edge,” said Rocco Viggiano, one of the SABERS project participants.

Safety is another key requirement for using batteries in electric aircraft. Unlike lithium batteries, solid-state batteries do not catch fire when physically damaged and can continue to work even in this condition. The SABERS researchers tested their battery at different pressures and temperatures. As a result, it was found that it can operate at temperatures almost twice as high as lithium batteries, and without the need for complex cooling systems.

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