The kid is bragging again, Tokyo Institute of Technology professor Isugi Taro threatens to fully charge the phone battery within 1 second

by:CTECHi     2021-08-09

'Now it takes more than one hour to fully charge a smart phone, but the new battery strives to be fully charged within one second.' Tokyo Institute of Technology professor Izusugi Taro is so bragging. Ichisugi Taro is trying to achieve unprecedented instant charging by improving the performance between the solid electrolyte and the positive electrode of the battery.

Tokyo Institute of Technology’s trial-produced all-solid-state lithium-ion battery

Current battery charging takes time because this time makes contact between different solid oxides Bad, the resistance increases. Isugi believes that if different kinds of solids can be connected at the atomic level, the resistance can be reduced. He is experimenting repeatedly based on this idea.

Issan uses lithium oxide, nickel and manganese, which has attracted much attention from automobile manufacturers, as the positive electrode, and lithium phosphate as the electrolyte. By applying the most advanced semiconductor manufacturing technology, the electrolyte is formed into a thin film on the surface of the positive electrode, so that the resistance between the solid electrolyte and the positive electrode is reduced to one-fifth to one-tenth of the resistance between the liquid electrolyte and the positive electrode.

Tokyo Institute of Technology is co-developing with large-scale semiconductor-related companies, and it is expected to trial production of batteries that can be used in practice in one year. The next goal is cars. The university will work with major automobile manufacturers to apply the low resistance proven on the film to bulk batteries, and strive to develop batteries that can be used for a long time.

The Japan Agency for the Promotion of Science and Technology (JST) is also developing all-solid-state batteries using oxide electrolytes. Kazuno Takada, the head of the Japanese Institute of Materials and Materials Research, who is in charge of related projects in general, pointed out cautiously that although the development momentum of thin films is very good, it will take time to replace the bulk batteries for cars. In spite of this, Professor Yi Sugi confidently stated that if the problem on the film is solved, the block shape will also apply.

Solid electrolyte of oxide developed by Nagasaki University. The state of blackening before power-on (left) and after short-circuiting

On the one hand, Hirotoshi Yamada, associate professor of Nagasaki University who participated in the Japan Science and Technology Agency project, said that the current density is being increased and the capacity is increased. Research. Ceramic materials lithium oxide, lanthanum, zirconium, and thallium are used in the electrolyte, and metallic lithium is used in the negative electrode.

As a negative electrode material, metal lithium has the best storage capacity. However, in repeated charge and discharge, a kind of dendrites called dendrites will be formed in the metal lithium, which will pass through the electrolyte to reach the positive electrode, causing a short circuit.

Associate Professor Yamada has developed a new technology to inhibit dendritic formation and presented this technology at the Electrochemical Society of the Academic Conference held in Hachioji, Tokyo in March.

The electrolyte is made by burning and solidifying oxide particles, and the dendrites are formed by circulating in the gaps between the particles after sintering. In response, Associate Professor Yamada and others mixed and sintered oxide particles with a diameter of about 2 microns and lithium hydroxide with a low melting point, so that lithium hydroxide with a thickness of about 0.5 microns covered the surface of the particles and filled the gaps. The results of energization experiments show that compared with uncovered particles, the current density before short-circuit can be increased up to 3 times.

Professor Yamada said that he will strive to put it into practical use as a power supply for sensors that can be charged by solar, wind, and vibration.

Although the commercialization of all-solid-state batteries has just begun, safety and high performance make it extremely attractive. In addition to automobiles, the future is also expected to be applied to sensors for the Internet of Things (ioT), remote recovery of natural resources, etc.

This is what the editor of Lithium Grid (li-b.cn) said, and most of the above are reprinted. I believe he has a ghost. There are constant black technology news about lithium battery charging on the Internet, but until now, it is still charging how to charge it.

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