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Research published in ‘Nature Communications’

Nov. 4, 2019

Chemical engineering and material scientists advance ways to optimize lithium-sulfur battery energy

In an era of ever-hungry consumer electronics, scientists at Michigan State University teamed up with researchers at General Motors to make progress on improving the life of lithium-sulfur (Li-S) batteries.

Professor Yue Qi and a team of researcher at MSU and General Motors have determined a way to improve Li-S batteries.
Professor Yue Qi and a team of researchers at MSU and General Motors have determined a way to improve the life of Li-S batteries.

Researchers including Yue Qi, a professor of chemical engineering and material science, her former PhD student Yuxiao Lin, and investigators led by Mei Cai at GM have determined a way to optimize the performance and energy density of Li-S batteries.

Their results have been published in an article, “Cathode porosity is a missing key parameter to optimize lithium-sulfur battery energy density," in Nature Communications.

“Our reliance on batteries will keep increasing on cell phones, the transportation industry, or storage of renewable energy,” Qi said. “Lithium-sulfur batteries promise higher energy density at lower cost than traditional lithium-ion batteries.”

For high-energy lithium-sulfur batteries, a dense electrode with low porosity is desired to minimize electrolyte intake, weight, and cost. Qi said their research demonstrated that the battery discharge performance changed significantly when the porosity in the sulfur/carbon composite cathode dropped from 70 percent to 40 percent. They found that the optimum performance occurs with 50 percent porosity determined by modeling and experiments.

“Batteries need to have higher energy density and be lower cost, long-lasting and compact,” she added. “The work calls the attention of the battery research community to optimize the porosity to balance the performance and energy density of Li-S batteries.”

Research by Yuxiao Lin ('19), in collaboration with MSU and GM, has been published by "Nature Communications."
Research by Yuxiao Lin ('19) is working to improve energy levels in lithium-sulfur batteries.

Lin is now a postdoctoral researcher at the Idaho National Laboratory. He graduated from MSU in May 2019 with an Outstanding Graduate Student Award and PhD in material science. The current research was done in collaboration with General Motors as part of Lin’s summer internship.

Research in "Nature Communications" discusses the need to optimize porosity in Li-S batteries.
A new article in "Nature Communications" discusses ways to optimize porosity in Li-S batteries.