The Samsung battery made by ‘miracle material’ graphene, can be charged in just 12 minutes.
Above, the ‘popcorn-looking’ graphene new battery. Image credit Samsung
The Samsung Advanced Institute of Technology (SAIT), explains about their new product:
Here, we report a chemical vapor deposition process to grow a graphene-silica 3D assembly, called a graphene-ball. Its hierarchical 3D structure with the SiOx nanoparticle center allows even 1 wt％ graphene-ball to be uniformly coated onto a nickel-rich layered cathode (LiNi0.6Co0.1Mn0.3O2) via mild Nobilta milling. The graphene-ball coating improves cycle life and fast charging capability by protecting the electrode surface from detrimental side reactions and providing efficient conductive pathways. The graphene-ball itself also serves as an anode material with high specific capacity of 716.2 mAh g-1. A full-cell incorporating graphene-balls increases the volumetric energy density by 27.6％ compared to a control cell without graphene-balls, showing the possibility of achieving 800 Wh L-1 in a commercial cell setting, along with a high cyclability of 78.6％ retention of the initial capacity after 500 cycles at 5C and 60 oC.