Murata and Stanford University collaborate to develop new technology that can significantly increase the output of lithium-ion secondary batteries
Murata Manufacturing Co., Ltd. and Stanford University have jointly developed a "porous current collector (PCC)" technology that can significantly increase the output of lithium-ion secondary batteries. After applying this technology to lithium-ion secondary batteries, its maximum output is equivalent to 4 times that of traditional current collectors.
The technology was jointly developed by Stanford University and Murata Manufacturing. Stanford University came up with the idea, and Murata Manufacturing provided the lithium-ion secondary battery development technology. It will continue to promote technological development to realize the practical application of this technology in lithium-ion secondary batteries.
In conventional lithium-ion secondary batteries, the thickness of the electrode is increased to increase capacity, which increases the distance lithium ions move in the electrode, resulting in increased resistance and reduced battery output (see figure below). This time, Murata Manufacturing has developed a technology that shortens the distance lithium ions move to half of conventional products. When this technology is applied to lithium-ion secondary batteries, a new path will be created for lithium ions, the resistance value will be halved, and the current flowing can be increased to twice the original. Therefore, compared with using conventional current collectors, a maximum output of four times can be generated, while the charging time is shortened to one-quarter.
Conventional lithium-ion secondary batteries use aluminum foil or copper foil as current collectors. By replacing them with this technology, the battery can be made lighter, while achieving high output and light weight for lithium-ion secondary batteries . It is estimated that if porous current collectors are introduced into cylindrical battery cells, the weight will be reduced by about 10% and the energy density per unit weight will increase by about 10%.
This technology can also improve the safety of lithium-ion secondary batteries . The lithium-ion secondary batteries with this new technology use resin as part of the current collector, so thermal runaway is less likely to occur even when a short circuit occurs, which is expected to improve the safety of the battery.
In addition, the new technology could accelerate the electrification of equipment broadly .
Conventional lithium-ion secondary batteries come in two types (pictured above): "cylindrical" and "laminated". This technology can be used in both types, so it can be used in a wide range of devices that use lithium-ion secondary batteries. In addition, the larger the battery, the better the effect of using this technology, so it is possible to achieve high output and fast charging of large-capacity lithium-ion secondary batteries that have not been achieved so far. In other words, in addition to conventional power tools and electric vehicles, people are increasingly looking forward to the electrification of large buses, trucks, and aircraft that cannot be handled by lithium-ion secondary batteries.
Main Features
1. Achieve up to 4 times the output of traditional lithium-ion secondary batteries and ultra-fast charging;
2. Simultaneously achieve high output and lightweight lithium-ion secondary batteries;
3. Improve the safety of lithium-ion secondary batteries;
4. Widespread acceleration of equipment electrification.
Murata Manufacturing will realize a more efficient energy society by applying this technology to lithium-ion secondary batteries, achieving unprecedented high output and ultra-fast charging. In addition, we will contribute to the realization of a carbon-neutral society by electrifying large power sources that previously had to rely on fossil fuels using high-output lithium-ion secondary batteries.
Note: The images in this article are from Stanford University. If you are interested in the above research results, please click here to view the references .
“
Click on the icon to explore more
”
京公网安备 11010802033920号