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标题：Breakthroughs for batteries could soon make them much better

Solid-state cells would be faster and safer than today’s lithium-ion equivalents

正文：Like any champion who spends too long at the top, the lithium-ion battery is stagnating. Over decades as the battery of choice in everything from smartphones to electric cars and drones, its design has been tweaked countless times to improve its energy density and performance. But, some scientists say,those improvements are approaching their theoretical limits. Even the best models are prone to dying out in the cold, rapidly losing capacity or—as is the case for those in household devices—spontaneously catching fire. Meanwhile,demand for batteries has never been greater. By the end of the decade,battery installations could rise by almost 40% globally, and electric vehicles (EVs) are projected to command 30% of car sales in 2026. Worthy challengers are desperately needed.

知识点： champion n. /ˈtʃæmpiən/
a person or thing that ranks top and achieves outstanding success. 佼佼者；冠军；顶尖事物
e.g. This bakery has long been the champion of local dessert sales. 这家烘焙店一直是本地甜品销量的佼佼者。

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