American Chemical Society, ACS Applied Materials and Interfaces, 12(6), p. 9590-9594, 2014
DOI: 10.1021/am501969m
Full text: Download
Nanocrystalline V2O5 particles were successfully entrapped by graphene nanoribbons (GNRs) derived from unzipped carbon nanotubes. The electrical conductivity of V2O5 nanoparticles was enhanced after introducing the GNRs. The 3-dimensional conductive framework in the composites plays a significant role in improving the rate performance and cyclability of the material when used as a cathode in lithium-ion batteries. By tailoring the mass ratio between the GNRs and the V2O5 nanoparticles, the fabricated composites can deliver a high capacity of 278 mAh g(-1) at 0.1 C which is closed to its theoretical value, while a capacity of 165 mAh g(-1) can be maintained at 2 C. The delivered capacity at 0.1 C can maintain 78% of its initial capacity after 100 cycles.