Ottawa -
SPG is the anode material used in lithium ion batteries. The testing was carried out by ProGraphite who concluded that
ProGraphite produced three SPG products with average sizes of approximately 15, 17 and 20 microns. The SPG yield ranged between 52.3 and 55.3 per cent compared to industry averages of 35 to 40 per cent. The particle size distribution was relatively steep in all cases which is a desirable quality. The tap density was also relatively high, ranging between 94 and 99 per cent. In part, this reflects the high bulk density of
Spheronization is the first step in manufacturing SPG and essentially involves micronizing the graphite flakes and rolling them up like a snowball. The spherical shape improves packing density in the anode which means higher capacity batteries, it creates more sites for lithium ion intercalation which results in better battery performance and it enables the anode material to be laid down quickly and uniformly in thin sheets during the battery manufacturing process.
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