July 20, 2024

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Apple supplier TDK claims solid-state battery breakthrough

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Japan’s TDK is claiming a breakthrough in materials used in its small solid-state batteries, with the Apple supplier predicting significant performance increases for devices from wireless headphones to smartwatches.

The new material provides an energy density — the amount that can be squeezed into a given space — of 1,000 watt-hours per litre, which is about 100 times greater than TDK’s current battery in mass production. Since TDK introduced it in 2020, competitors have moved forward, developing small solid-state batteries that offer 50 Wh/l, while rechargeable coin batteries using traditional liquid electrolytes offer about 400 Wh/l, according to the group.

“We believe that our newly developed material for solid-state batteries can make a significant contribution to the energy transformation of society. We will continue the development towards early commercialisation,” said TDK’s chief executive Noboru Saito.

The batteries set to be produced will be made of an all-ceramic material, with oxide-based solid electrolyte and lithium alloy anodes. The high capability of the battery to store electrical charge, TDK said, would allow for smaller device sizes and longer operating times, while the oxide offered a high degree of stability and thus safety. The battery technology is designed to be used in smaller-sized cells, replacing existing coin-shaped batteries found in watches and other small electronics.

The breakthrough is the latest step forward for a technology industry experts think can revolutionise energy storage, but which faces significant obstacles on the path to mass production, particularly at larger battery sizes.

Solid-state batteries are safer, lighter and potentially cheaper and offer longer performance and faster charging than current batteries relying on liquid electrolytes. Breakthroughs in consumer electronics have…



2024-06-16 19:40:42

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