A group of scientists at the University of Maryland Energy Research Centre and A. James Clark School of Engineering have announced a transformative development in the event to produce batteries those are affordable, safe, and powerful.
The scientists are introducing game – changing solid state battery technology and have introduced core advancement by placing a layer of ultra – slim aluminum oxide between a robust non-flammable ceramic electrolyte called ad garnet and lithium electrodes. Prior to this study, there had been little success in introducing high – performance, solid – state batteries based on garnet as the exceeding impedance, more commonly known as resistance between the garnet electrolyte and electrode substances limited the flow of current or energy, drastically diminishing the battery’s potential to discharge and charge.
The group from the University of Maryland has brought a solution to this problem of high impedance between the garnet electrolyte and electrode substances with the layer of ultra-slim aluminum oxide that decreases the impedance to around 300 folds. This virtually eradicated the obstacle to electricity flow within the battery, enabling for effective charging and discharging of the stored energy.
“It is a revolutionary advancement in the niche of solid-state batteries, specifically in light of recent battery fires from Boeing 787s to hover boards to Samsung smartphones,” says Lianbing Hu, an associate lecturer of materials science and engineering and one of the corresponding authors of the paper. “Our solid battery based on the garnet is a triple threat that solves the common troubles with the existing lithium-ion batteries that are performance, cost, and safety.”
Lithium-ion batteries usually include a liquid organic electrolyte, which can catch fire, as shown by multiple consumer electronic battery fires and even the temporary grounding of the Boeing 787 fleet for a range of battery fires. Such fire risk is eradicated by the UMD group to use the non – flammable garnet based solid state electrolyte.
“Such work by the group efficiently solves the lithium metal solid electrolyte interface resistance trouble that has been a major obstacle to the development of a robust solid-state battery technology,” says Bruce Dunn, UCLA materials science and engineering lecturer. Dunn, a renowned expert in energy storage substances was not involved in the practical research work.
Moreover, the great stability of such garnet electrolytes allows the group to employ metallic lithium anodes, which comprise the greatest possible theoretical energy density and are deemed as ‘holy grail’ of batteries. Linked with high capacity sulphur cathodes, these all solid-state battery technology offers a potentially unparalleled energy density that far outperforms any lithium – ion battery presently on the market.
“Such technology is on the edge of altering the landscape of energy storage. The extensive deployment of batteries is crucial to enhance the flexibility of how and when energy is utilized and such solid – state batteries will both enhance the safety and diminish the size, cost, and weight of batteries,” says Eric Wachsman, lecturer and director of the University of Maryland Energy Research Centre and other associated author of the paper
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