Samsung's “Balls” Battery Charges At 5C, Retains 78.6% Capacity After 500 Cycles

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 …

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