“Pompon” graphene as a new promising anode for LIBs

Abstract

The "pompon" graphene was obtained by the new modified controlled detonation gas synthesis tested as an anode of LIBs. Processing of Raman spectra by changing the position of the G-band shows the presence of a mixture of 2, 3 and 4-layer graphene structures. The results of the surface area measurement by the BET method have been shown the limited availability of the "pompons" for the penetration of lithium ions between its layers. Subsequent thermomechanical activation leads to partial "delamination” of the pompon and the production of both separate and 2-layer sheets of graphene, which is reflected in a sharp increase in its specific surface area. The specific capacity of graphene, as an anode of LIBs, increases in the range M0 < M20 < M40 and reaches of 500 mAh•g-1 at a current density of 37.2 mA•g-1 for the best M40 sample. The obtained values of specific capacity are 1.5 times higher than similar values for graphite-based anodes.