Researchers develop reliable rechargeable zinc battery

Global SourcesUpdated on 2023/12/01

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Redesigned zinc battery that does not short targets grid.

A conventional zinc battery (left) short circuits when dendrites growing from the zinc anode make contact with the metal cathode. The redesigned battery (right) uses plastic and carbon insulators to prevent zinc dendrites from reaching the cathode. Source: Shougo Higashi/Stanford via EE Times

Researchers from Stanford University and Toyota have developed a novel battery design for grid-scale energy storage. The battery has electrodes made of zinc and nickel, inexpensive metals that are available commercially. Few zinc batteries are reliably rechargeable, however.

Tiny fibers called dendrites that form on the zinc electrode during charging can eventually reach the nickel electrode, causing the battery to short circuit and fail. Researchers solved the dendrite problem by redesigning the battery.

Instead of having the zinc and nickel electrodes face one another, as in a conventional battery, the researchers separated them with a plastic insulator and wrapped a carbon insulator around the edges of the zinc electrode.

"With our design, zinc ions are reduced and deposited on the exposed back surface of the zinc electrode during charging," Shougo Higashi, a visiting scientist from Toyota Central R&D Labs Inc. and lead author of the study, said in a release. "Therefore, even if zinc dendrites form, they will grow away from the nickel electrode and will not short the battery."

To read the full article, go to EETimes.

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Researchers develop reliable rechargeable zinc battery

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