The authors of the new work found that doping the cathode material with an ionic liquid helps
Lithium metal batteries are a promisingenergy storage technology, since pure lithium provides an incredibly high energy density. If you use lithium instead of graphite and copper, then this will lead to a significant increase in performance. For example, smartphones will be able to work for several days.
But there is also a problem, lithium-metal batteries are unstable.The authors of the new work have come up with a way to overcome this problem - to replace liquid components with solid ones.
For example, the design of solid state batteriesstipulates that lithium ions, which carry a charge, pass through a solid electrolyte material, and not through a liquid one. This has its drawbacks - instability at the boundary between the solid electrolyte and the battery electrodes.
The authors of the new work decided to use a quasi-solid-state electrode, which can be used in a solid-state lithium metal battery.
The researchers worked with one of the solid electrolyte candidates, LLZO.It interacts relatively well with lithium metal anodes, but causesThe idea was to improve contactand reduce the resistance between the solid ceramic electrolyte and the cathode by adding an ionic liquid at room temperature, or liquid salt.
As a result, the fluid filled structural voids and improved contact with the solid electrolyte in lithium-metal batteries. The prototype battery showed impressive stability, it maintained 80% of the100 charge and discharge cycles at 60 °C.
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