Samsung graphene coating for batteries to fully charge in about 15 minutes not 75 minutes

[ScienceRocks]

Samsung graphene coating for batteries to fully charge in about 15 minutes not 75 minutes
brian wang | November 28, 2017 |

Samsung has created a graphene ball coating for use inside a regular li-ion battery cells, which will increase the overall capacity by up to 45 percent and speeding up charging by five times.

Nature Communications – Graphene balls for lithium rechargeable batteries with fast charging and high volumetric energy densities
Improving one property without sacrificing others is challenging for lithium-ion batteries due to the trade-off nature among key parameters. Here we report a chemical vapor deposition process to grow a graphene–silica assembly, called a graphene ball. Its hierarchical three-dimensional structure with the silicon oxide nanoparticle center allows even 1 wt% graphene ball to be uniformly coated onto a nickel-rich layered cathode via scalable Nobilta milling. The graphene-ball coating improves cycle life and fast charging capability by suppressing detrimental side reactions and providing efficient conductive pathways. The graphene ball itself also serves as an anode material with a 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% capacity retention after 500 cycles at 5C and 60 °C.

Samsung graphene coating for batteries to fully charge in about 15 minutes not 75 minutes | NextBigFuture.com


Wow!

 

[Old Rocks]

Given the economic rewards for a fast charging battery with increased storage and longevity, many companies are working on a variety of paths to achieve that goal. And we will see those batteries in the near future.