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 has the best chemical and mechanical properties. Matching, achieving a good continuity of the battery.
Solid-state batteries are not sensitive to heat and do not contain any liquid components that may leak or catch fire. Therefore, they are considered to be safer, more reliable and more durable than conventional lithium-ion batteries. One of the key factors affecting the development of solid-state batteries is the low current passing through. It will cause the battery to charge longer. Generally, the solid battery needs to be fully charged for about 10-12 hours, and the new battery can be fully charged in less than one hour.
Project leader Dr. Temple said that the use of liquid electrolytes in traditional lithium-ion batteries can very well contact the electrodes. Electrodes with textured surfaces absorb liquid like a sponge to form a large contact area; 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 using very similar material components, made of different phosphate compounds. Solid electrolyte as a stable carrier material, The phosphate electrode is made by screen printing on both sides. The materials used are reasonable and easy to process. The new solid-state battery basically contains no toxic or harmful substances.
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. After 500 charge and discharge, it still maintained 84% of the original capacity. 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.
