Electric Vehicles Rejoice: Scientists Develop Cobalt-Free, Cost-Efficient Battery Production

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A thin ceramic layer simultaneously functions as a solid electrolyte and separator. It is very effective against both the dangerous short circuits caused by the growth of lithium dendrites and thermal runaway. In addition, they contain no easily inflammable liquids.. This material must be sintered together with the cathode at over 1050 °C to convert the LLZO to the rapid lithium-conducting cubic crystalline phase, sufficiently densify it, and strongly bind it to the electrode.

To optimize the conditions for this synthetic route, Rupp and her team analyzed the multistep phase transformation of LLZO from an amorphous form to the required crystalline form using a variety of methods and produced a time-temperature-transformation diagram. Based on the insights they gained into the crystallization process, they developed a route by which cLLZO is obtained as a dense, solid film after 10 hours of annealing at the relatively low temperature of 500 °C—with no sintering. For future battery designs, this method will allow for the integration of the solid LLZO electrolyte with sustainable cathodes that could avoid the use of socioeconomically critical elements such as cobalt.

Reference: “Time-Temperature-Transformation Diagram of Battery-Grade Li-Garnet Electrolytes for Low-Temperature Sustainable Synthesis” by Yuntong Zhu, Michael Chon, Carl V. Thompson and Jennifer L. M. Rupp, 18 September 2023,SciTechDaily: Home of the best science and technology news since 1998. Keep up with the latest scitech news via email or social media.The West Antarctic Ice Sheet’s melting rate is projected to rise significantly this century, irrespective of fossil fuel cutbacks.

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