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The latest substitute for lithium battery
Time : 2018/3/31    Clicks : 94    Public:Legend of Lipos
As everyone knows, the mobile device into a bottleneck in battery life issues in recent years, the lithium battery manufacturers had to increase the battery capacity to solve the problem, but this scheme increases capacity is not a permanent solution, the Samsung Note7 explosion to the lithium battery industry undoubtedly began pouring a pot of cold water. However, the researchers determined the innovation always did not give up, and finally in a new solution recently discovered that condensation method, this method can guarantee to enhance endurance of lithium battery safety, and can be bent, in order to fully meet the possible flexible mobile devices.
So what is the condensation in the end? In fact, it is to use ice template (ice-templating) to vertically aligned the solid electrolyte structure inside the battery to enhance electrical conductivity. The new type of battery also paved the way for the concept of flexible smartphones and tablet computers.
At the moment, the high flammability of liquid electrolytes for rechargeable lithium batteries on the market is highly vulnerable to safety. Last year, it was the Note 7 accident. Therefore, the Institute of engineering and Applied Sciences of the Columbia University decided to try to use solid electrolytes instead of flammable liquid electrolytes.
Because the traditional liquid electrolyte is highly inflammable, they use the ice template to make the ceramic solid electrolyte exhibit a vertically aligned columnar structure, and the battery using ceramic solid electrolyte is obviously safer and more conductive. The method of making this battery is also very rare. When making, first add ceramic particles at the bottom and cool the aqueous solution, then let the ice grow, and squeeze out part of the frozen aqueous solution, so that the ceramic particles will become the mainstream in the battery. Finally, create a vacuum environment to let the ice lift the HUAWEI vapour, so that the vertical alignment architecture is built. After vertical alignment, we need to combine with polymer. The latter is a macromolecule composed of many repeating sub units, so that it can provide mechanical support and flexibility for electrolytes.
Big brother of material science and Engineering Assistant Professor Yuan Yang said, whether it is in solid state lithium battery flexible mobile devices or electric vehicles, can solve the security problem once and for all, but also increase the energy density. In previous experiments, the researchers used a variant of the solution. They used random dispersed ceramic particles in polymer electrolytes, and tried ceramic electrolytes of fibers. However, these schemes could not achieve vertical alignment.
In previous experiments, the researchers used a variant of the solution. They used random dispersed ceramic particles in polymer electrolytes, and tried ceramic electrolytes of fibers. However, these schemes could not achieve vertical alignment. The study's lead author Haowei Zhai said: "then we believe that as long as the combination of ceramic electrolyte vertical alignment structure and polymer electrolyte, can make lithium ion conductivity on fast track and enhance battery." He also mentioned that they believe it is the first time in the industry to use ice templates to make flexible solid electrolytes. The new electrolytes are not only safe and reliable, but also harmless. The new scheme optimized the conductivity of lithium ion and opened a window for the development of the next generation rechargeable battery. After being replaced by solid electrolysis, the graphite layer used for the negative electrode of the lithium battery can be replaced with a lithium metal, which can improve the energy of the 60~70% battery.
At present, the team is ready to optimize the quality of the combination of electrolytes and try to load this new type of battery, making the future lithium battery safer and stronger.