Samsung succeeds in the development of lithium battery adopted graphene with double battery density

For higher performance of smartphones, digital cameras, electric cars, etc.,Lithium ion batteryThe development of lithium ion batteries with higher performance is required in the future. Samsung has announced that it succeeded in making the energy density of such a lithium ion battery 1.8 times. Thanks to this technology, it is expected to put into practical use a battery with the same size as the conventional size and double the battery capacity, or a small battery whose battery capacity is the same while half the size of the conventional one.

Silicon carbide-free graphene growth on silicon for lithium-ion battery with high volumetric energy density - ncomms 8393.pdf
(PDF file)http://www.nature.com/ncomms/2015/150625/ncomms8393/pdf/ncomms8393.pdf

More Energy: Samsung Develops Tech to Double Lithium Battery Capacity | BusinessKorea
http://www.businesskorea.co.kr/article/11188/more-energy-samsung-develops-tech-double-lithium-battery-capacity

Samsung'sIn Hyun SungThe development team of Mr. et al.anodeBy reviewing the materials, we succeeded in developing a lithium-ion battery with an energy density of 1.8 times higher than before, a scientific journalNature communicationsWe announced at.

Carbon was used for the anode of conventional lithium ion batteries. However, replacing silicon with an anode material is thought to give higher energy density, research and development of silicon anode has been carried out, but the silicon anode quickly degraded by repeating charge and discharge It was said that there was a drawback of doing it.

Mr. In and colleagues used the world's thinnest material having only one carbon thickness on the surface of silicon used for the anode materialGrapheneSucceeded to significantly improve the durability of the silicon anode by coating the coating film. It seems that we succeeded in the manufacture of lithium-ion batteries that combines high energy density and durability twice as much as conventional.

This is because the silicon used for the anode materialTransmission electron microscopeExpanded by.


As you expand further, you can see that the graphene layer covers the surface of silicon oxide.


According to Mr. In et al., The lithium ion battery using the graphene film silicon anode has an energy density 1.8 times higher than the conventional lithium ion battery ratio, and maintains the energy density 1.5 times even after repeating 200 times of charging and discharging It was confirmed that it was confirmed.

The high energy density technology of lithium ion battery developed by Samsung this time is expected to be put into practical use within a few years, and it is expected that a larger capacity and compact battery will appear.