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Two Universities Of The USA Are Using PDMS Layers To Reduce The Generation Of Lithium Dendrites In Lithium Metal Batteries

- Dec 18, 2018 -

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Recently, researchers at Arizona state university and their rice counterparts are using a 3-d polydimethylsiloxane, or silicone, layer as the base material for lithium metal anodes, aimed at slowing the formation of lithium dendrites.

According to Hanqing Jiang, a professor in the department of material transport and energy at Arizona state university, the method could extend battery life, eliminate the safety risks of lithium-ion batteries and lithium-air batteries, and be used in metal anode batteries.

Jiang said he and his research team did not focus on finding new materials or electrochemical properties, which mechanical engineers do. They took a different approach, focusing on stress, which is itself a factor in the growth of lithium dendrites.

The study included adding a layer of PDMS below the battery anode to "significantly reduce" the growth of lithium dendrites. The researchers suggest that many of the wrinkles in the beginning are directly related to the cumulative stress in the lithium metal.

In addition, the research team has designed a new method -- PDMS substrate, using its polyhedral three-dimensional structure, hope to extend the life of lithium metal battery, while maintaining its high energy density.