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 (ASU) and Rice University Their peers used 3D polydimethylsiloxane (PDMS) or silicone layers as the substrate for lithium metal anodes to reduce the formation of lithium crystal branches.
According to Hanqing Jiang, professor of the Department of Materials Transmission and Energy at Arizona State University, this method may extend battery life and is aimed at eliminating the safety risks of lithium-ion batteries and lithium-air batteries. It can also be used in metal anode batteries.
Jiang said that he and his research team did not focus on finding new materials or electrochemical performance. It was the mechanical engineer's work. They took a different path and focused on the stress because of the stress itself. It is one of the factors that increase the growth of lithium crystals.
The study includes: Adding a new layer of PDMS below the anode of the battery, aimed at 'remarkable reductions'. The growth of lithium is reported. According to researchers, the above factors are directly related to the cumulative stress inside the lithium metal. Wrinkles-like PDMS substrates will play a positive role in stress relief.
In addition, the research team also designed a new method - for PDMS substrate, using its multi-dimensional three-dimensional structure, hope to extend the service life of lithium metal batteries while maintaining its high energy density.
