Spontaneous combustion, explosion, air embargo, recall, production, stock prices plunged, after a series of nightmares, Samsung is the battery safety issues about the earth trembled and the mountains swayed.
But Samsung only in the global recall of Galaxy Note. The internal friction of money 7. In a statement released to the public, the company mentioned only that it could be caused by overheating. But a lot of engineers to analyze, because of the pursuit of high capacity battery and ultra thin fuselage, Samsung thinning of the cell membrane thickness, a sharp increase in the risk of short circuit breakdown; also the opinion of the engineer, is the control algorithm of battery is wrong, let the body overheating, causing the battery to overheat caused by spontaneous combustion or explosion.
No matter how, at the outbreak of the crisis, the security problem of lithium battery vulnerable to let Samsung suffered from it, if you do not solve the battery safety problem from the source, after the equipment is still facing similar problems.
Recently, Fudan University, South Korea's Samsung Advanced Institute of Technology (Samsung Advanced Institute of Technology) and Samsung Electronics R & D center China (Samsung R& D Institute China) a research and development team, launched a new type of lithium battery, it has powerful self-healing function, can significantly enhance the safety performance of lithium batteries.
The research team by Wang Yonggang and the leadership of Peng Huisheng, they use carbon nanotube materials and novel structure, want to let the battery under the external force change after the rapid recovery of the original structure, continue to maintain the normal work.
Specifically how to do?
The researchers will be aligned CNTs, and the CNTs, laying a layer of polymer as the substrate electrode, electrode embedded with LiMn2O4 nanoparticles, the other pole is embedded in LiTi2 (PO4) 3 nanoparticles. At the same time, the battery also uses Li2SO4/ carboxymethyl cellulose as electrolyte and separator. This material is a new kind of non solvent electrolyte, which is made from cellulose based gel, containing lithium sulfate solution. There are two core technology added, after repeated damage, the battery can also heal, to maintain a very good performance.
the model of the human body can be self healing of the elbow of the battery, after power LED lamp is lit
repeatedly bend the elbow after the battery is cut off, LED lights
battery repeatedly burst, and then repaired, LED lights and automatically lit up
In modern wearable electronic devices, although some lithium batteries can be folded or rolled up. However, they are likely to be a problem if they are twisted too many times, or trampled on. And as a part of wearable devices, this situation is very common. Folding will not only make the battery lose its function, and even lead to security problems, it will let the corrosive flammable toxic gas or liquid will leak out, and even lead to spontaneous combustion.
The traditional electrolyte will break down immediately when exposed to air, but this new type of gel is very stable. Because it does not contain organic solvents, so it is not flammable and does not have toxicity, used in this kind of battery is very suitable.
Perhaps, such a battery is still a certain distance from the commercial use, but out of flexibility, portability and security considerations, the various giants or very likely to increase investment in this area. Maybe after the battery safety, on it.