researchers say ice could be the key to radical new long life lithium smartphone batteries and bendable handsets - lithium batteries for sale
Researchers have developed a new method of freezing that can make lithium batteries safer, have longer battery life and can bend.
The method of using ice
The template vertically aligns the structure of the solid electrolyte inside the battery, providing enhanced conductivity.
This could bring new technologies such as flexible smartphones and tablets.
Scrolling down to play the liquid electrolyte used in commercial rechargeable lithium batteries is very flammable and can cause safety problems, as is the scandal that Samsung Galaxy Note 7's battery caught fire and exploded.
Therefore, researchers from the School of Engineering and Applied Sciences of Columbia University decided to use solid electrolyte instead of liquid electrolyte for experiments. They used ice-
The template makes a column structure with ceramic solid electrolyte vertically aligned.
The battery based on ceramic solid electrolyte is safer and has strong conductive properties.
In order to make the battery, the researchers use the ceramic particles cooling water solution from the bottom, then let the ice grow, push away and concentrate the ceramic particles.
They then vacuum the solid ice into gas-
The structure that causes vertical alignment.
They then combine this structure with the polymer, which is a large molecule composed of many repetitive molecules.
Provide mechanical support for the electrolyte and make it more flexible.
Flexible full range in portable electronics, as well as electric vehiclessolid-
Dr. Yang Yuanyang said that the national lithium battery not only solves the safety problem, but also may improve the energy density of the batteries transported and stored, assistant professor of materials science and engineering of Columbia Engineering, and head of the research team.
Dr. Yang said they had shown great hope in the manufacture of flexible devices, and his research team focused on electrolytic energy storage, conversion and thermal energy management.
In previous studies, researchers used variations of this method.
They use randomly dispersed ceramic particles in polymer electrolyte or fiber
Like ceramic electrolyte without vertical alignment.
We believe that if we combine the vertical arrangement structure of ceramic electrolyte with polymer electrolyte, we will be able to provide a fast channel for lithium ion, thereby increasing the conductivity, dr. Yang's doctoral student and lead author of the research paper, said Yan Haowei.
We believe this is the first time anyone has used ice.
Template method for manufacturing non-flammable, non-toxic flexible solid electrolyte in lithium batteries.
This opens up a new way for the next step to optimize ion conduction
Rechargeable battery.
The researchers said the technology can increase the energy density of the battery, that is, the amount of energy stored in a given space area system per unit volume.
By using a solid electrolyte, the negative pole of a lithium battery-
Current graphite layer-
It may be replaced by lithium metal, which may increase the energy of the battery by 60-70.
Dr. Yang and his PhD student, Zhai, then plan to optimize the quality of the combined electrolyte and assemble the flexible solid electrolyte with the battery electrode to make a prototype of the all-lithium battery.
Dr. Wang Hailang, an assistant professor of chemistry at Yale University, said it was a smart idea that he did not participate in the study.
The well-designed structure does help to improve the performance of the composite electrolyte.
'I think this is a promising approach,' he said.