What immortal battery? It can be fully charged in 3 minutes and has a 20-year ba
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2022/10/28 15:45:14
Scientists at Harvard University have developed a new solid-state lithium-metal battery for electric vehicles, which is expected to fully charge in three minutes and last for 20 years, foreign media reported on September 19. The paper was published recently in the journal Nature.
For new energy vehicles, the key to their development is closely related to battery technology, and many scientists also hope to continue to make great articles on lithium batteries.
Now, startup Adden Energy has announced that it has received an exclusive license from Harvard University's Office of Technology Development to advance commercialization of the technology, which aims to shrink batteries to palm-sized "softpack batteries" with components encased in aluminum-coated films.
According to the introduction, the battery uses a pure metal form of lithium, rather than the lithium ion used in electric vehicle batteries currently on the market. Meanwhile, "solid" refers to the use of solid electrodes and solid electrolytes, rather than the liquid or polymer-gel electrolytes found in lithium-ion batteries.
In the lab, the team's battery prototype has achieved charging speeds as fast as three minutes and can cycle more than 10,000 times during its lifetime. At present, even the best batteries in their category only have 2,000 to 3,000 charging cycles, and the technology could be a "game changer," the researchers said.
Lithium-metal batteries can store a lot more energy for the same volume, but take much less time to recharge than traditional lithium-ion batteries. They easily form "dendrites" -- tiny, rigid tree-like structures. Dendrites grow in the cell, and their needle-like parts are called dendrites. These structures grow into the electrolyte like roots and Pierce the barrier separating the anode and cathode, which can cause the battery to catch fire.
A sandwich - like multilayer structure prevents the formation of dendrite structures. If you think of the battery as a sandwich, the first layer is bread (lithium metal anode), then lettuce (graphite coating), followed by a layer of tomato (first electrolyte) and a layer of bacon (second electrolyte), and finally another layer of tomato and the last piece of bread (cathode). In this design, dendrites grow in "lettuce" and "tomato" but stop at "bacon". The "bacon" barrier prevents dendrites from crossing and shorting the battery, thus preventing faults.
In addition, the cell is self-healing, which means its chemistry allows it to backfill holes created by dendrites.
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