Researchers at Argonne National Laboratory say they have found ways to make stable lithium sulfur batteries that last 700 cycles.
Researchers at Argonne National Laboratory say they have found ways to make stable lithium-sulfur batteries that last 700 cycles.While lithium-ion batteries are the mainstay of electric vehicles today, they do have certain drawbacks. They tend to overheat and they don’t always last as long as we might like. In addition, some of the raw materials are in short supply, which means the cost to manufacture them is rising rather than falling as expected due to economies of scale.
To prevent this polysulfide shuttling, the researchers tried placing a redox-inactive interlayer between the cathode and anode. The term “redox-inactive” means the material does not undergo reactions like those in an electrode. But this protective interlayer is heavy and dense, reducing energy storage capacity per unit weight for the battery. It also does not adequately reduce shuttling, which has proven to be a major barrier to the commercialization of lithium-sulfur batteries.
To further study the redox-active layer, the team conducted experiments at Argonne’s Advanced Photon Source, a DOE Office of Science user facility. The data gathered from exposing cells with this layer to X-ray beams allowed the team to ascertain the inter layer’s benefits.
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