Graphene nanoribbon/V2O5 cathodes in lithium-ion batteries.
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 close to its theoretical value, whereas 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.
Department of Chemistry, ‡Smalley Institute for Nanoscale Science and Technology, and §Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States.
Yang
Y
Yang
Lei
L
Li
Huilong
H
Fei
Zhiwei
Z
Peng
Gedeng
G
Ruan
James M
JM
Tour