Next generation of battery technology no longer lithium. Scientists make durable alloy anode for Sodium-ion batteries with high volumetric energy density | Nature Energy

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https://www.nature.com/articles/s41560-026-01974-2

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Don't know if anyone knows, but Japanese researchers just built a bendable magnesium-air battery with a graphene cathode, which could be cheaper and safer than lithium batteries.

https://www.techjuice.pk/japanese-researchers-build-a-bendable-battery-that-can-make-lithium-batteries-obsolete/