Hierarchical MoO2/N-doped carbon heteronanowires with high rate and improved long-term performance for lithium-ion batteries

作者：Yang, L. C.; Sun, W.; Zhong, Z. W.; Liu, J. W.; Gao, Q. S.^*; Hu, R. Z.; Zhu, M.^*

来源：Journal of Power Sources, 2016, 306: 78-84.

DOI：10.1016/j.jpowsour.2015.11.073

• Molybdenum dioxide
• N-doped carbon matrix
• Heterostructure
• Long-cycle life
• Pseudocapacitive effect
• Lithium-ion battery

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.

• 出版日期2016-2-29
• 单位暨南大学; 华南理工大学