28 Apr '17, 11am

Zinc sponge anode makes Li-ion alternative rechargeable

Zinc sponge anode makes Li-ion alternative rechargeable

While useful in non-rechargeable applications – it is the basis for ‘alkaline cells’ – zinc electrodes tend to grow dendrites (whiskers) when charged, wrecking the cell. Scientists at the US Naval Research Laboratory (NRL) have created nickel-zinc batteries with 3D sponge zinc anode instead of powdered zinc. “The key to realising rechargeable zinc-based batteries lies in controlling the behaviour of the zinc during cycling,” said NRL researcher Joseph Parker. “Electric currents are more uniformly distributed within the sponge, making it physically difficult to form dendrites.” The monolithic zinc sponge anodes can be cycled in nickel–zinc alkaline cells hundreds to thousands of times without undergoing passivation or macro-dendrite formation, according to the abstract of ‘Rechargeable nickel–3D zinc batteries: An energy-dense, safer alternative to lithium-ion ‘, published ...

Full article: https://www.electronicsweekly.com/news/research-news/zinc...

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