Capacitive behavior dominated persistent lithium storage in the 3D carbon nanofibers with 1D molybdenum sulfide

As the anode material of lithium ion battery, molybdenum disulfide (MoS₂) has a theoretical capacity far exceeding that of graphite. However, its development is greatly limited by the structural changes and low conductivity during the cycle. Here, we prepared three-dimensional (3D) nitrogen doped carbon nanofibers embedded with MoS₂ nanorods by electrospinning and hydrothermal methods. One dimensional (1D) MoS₂ nanorods are perfectly distributed in the carbon nanofibers along the axial direction, improving the stability and promoting the rapid insertion/removal of lithium ions. The outer molybdenum sulfide sheet provides more reactive sites, and the hierarchical nanostructures with high conductivity are constructed to obtain lithium ion storage materials dominated by high capacitance behavior. At the same time, it maintains the capacity of 736.7 mAh/g under the high current density of 5 A/g, showing excellent long cycle stability. This work provides a new possibility for the study of long cycle stable lithium ion storage at high rates.