Experts at the Ulrich Research Center in Germany have developed a new type of solid-state battery that has a charge rate ten times higher than that of the solid-state battery recorded in the existing literature. The new battery pack is made of a phosphate compound and the material is optimally matched for chemical and mechanical properties, achieving a consistently good passability of the battery.
Solid-state batteries are considered to be safer, more reliable, and more durable than conventional lithium-ion batteries because they are insensitive to heat and do not contain any liquid components that may leak or catch fire. One of the key factors affecting the development of solid-state batteries is the low current passing through, which can result in longer battery charging times. It takes about 10-12 hours for a solid-state battery to be fully charged again, and the new battery can be fully charged in less than an hour.
The project leader Dr. Temple said that in the traditional lithium ion battery, the liquid electrolyte can be used to contact the electrode very well. The electrode with the textured surface absorbs the liquid like a sponge to form a large contact area. The two solid materials cannot In this way, the contact resistance between the electrode and the electrolyte is correspondingly higher, which affects the passage of current.
In order to maximize the flow of current at the boundary of the solid layer, the research team designed the solid-state battery electrode and electrolyte to use very similar material components, made of different phosphate compounds. As a stable carrier material, solid electrolytes are produced by screen printing on both sides of the phosphate electrode. The materials used are reasonably priced and easy to process. New solid-state batteries are essentially free of toxic or hazardous materials.
According to Temple, the solid-state batteries they designed are based on the best combination of materials. This design proves that solid-state batteries are completely viable and achieve high charging rates and fast charging.
Dr. Shi Chengyu, a Chinese scholar who participated in the project, said: "In the initial test, the charge and discharge cycle of the new battery was quite stable, and it still maintained 84% of the original capacity after 500 charge and discharge. Of course, there is room for improvement in the new battery. Theoretically it is feasible to achieve losses below 1%."
Professor Eicher, director of the Ulrich Energy and Climate Institute, said: "The current energy density of new batteries is about 120 mAh per gram, which is already very high, even though they are still slightly lower than lithium-ion batteries on the market today. ”
In addition to being used in the development of electric vehicles, the solid-state battery can be applied to aerospace, smart homes and medical devices.