Using PDMS layer can reduce the formation of lithium branching in lithium metal battery

According to foreign media reports, lithium metal batteries are one of the most promising battery products for high-density energy storage technology. Today, researchers at Arizona State University and colleagues at Rice University use the 3D polydimethylsiloxane (PDMS) layer or silicone layer as a substrate for the formation of lithium metal anode crystals.

The method could extend the battery's life to eliminate the safety risks of lithium-ion and lithium-air batteries, and could also be used for metal anode batteries, according to Hanqin Jiang, a professor at Arizona State University's Department of Material Transmission and Energy.

Ji said he and his team did not see the key to the problem as finding new materials or electrochemical properties, which mechanical engineers do. They found another way to focus on stress, which itself is one of the factors in the growth of lithium branching.

The study included adding a layer of PDMS to the battery anode, aiming to "significantly reduce the growth of lithium shoots". According to the researchers, these factors are directly related to the accumulated stress inside the lithium metal, and the corrugated PDMS substrate will play a positive role in relieving the stress.

In addition, the research team also designed a new method-PDMS substrate, using its multi-dimensional three-dimensional structure, hoping to extend the service life of lithium metal batteries while maintaining their high energy density.

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