Previously, researchers had created a biodegradable zinc-ion battery using chitin in crab shells. But alternatively, they can also be converted to “hard carbon”, a material that can act as an anode for sodium-ion batteries.
To make the “crab carbon,” the researchers heated the shells to temperatures exceeding 573 degrees Celsius. They then added carbon to a solution of tin sulfide or iron sulfide and then dried it to form anodes.
When tested on a model battery, the team found that both composites had good capacity and could last at least 200 cycles.
Source: Ferra
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