Hierarchical MoO2/N-doped carbon heteronanowires with high rate and improved long-term performance for lithium-ion batteries
By Yang, L. C.; Sun, W.; Zhong, Z. W.; Liu, J. W.; Gao, Q. S.; Hu, R. Z.; Zhu, M.
Published in Journal of Power Sources
2016
Abstract
Abstract Hierarchical MoO2/N-doped carbon heteronanowires (MoO2/N-C H-NWs) are synthesised by simple calcination using organic-inorganic hybrid nanowires as a precursor and self-template. In the heterostructure, MoO2 nanoparticles are not only anchored on but also embedded in the one-dimensional N-doped carbon matrix. The synergistic effect promotes the pseudocapacitance, decreases the charge transfer resistance, and buffers the volume change on the reaction of MoO2/N-C H-NWs with Li+. Therefore it endows the composite with enhanced kinetics and stability for reversible Li+ storage. At a current density of 2 A g?1, the MoO2/N-C H-NWs deliver a reversible capacity of 700 mAh g?1 after 400 cycles, which still remains 570 mAh g?1 even after 1500 cycles. The high capability suggests that the MoO2/N-C H-NWs may be a promising candidate for use as anode material in high-performance lithium-ion batteries.