CuO Quantum Dots Embedded in Carbon Nanofibers as Binder-Free Anode for Sodium Ion Batteries with Enhanced Properties

摘要: The design of sodium ion batteries is proposed based on the use flexible membrane composed ultrasmall transition metal oxides. In this paper, preparation CuO quantum dots (≈2 nm) delicately embedded in carbon nanofibers (denoted as 2-CuO@C) with a thin film via feasible electrospinning method reported. content can be controlled by altering synthetic conditions and optimized to 54 wt%. As binder-free anode for batteries, 2-CuO@C delivers an initial reversible capacity 528 mA h g-1 at current density 100 , exceptional rate capability 250 5000 ultra-stable 401 after 500 cycles . enhancement electrochemical performance attributed unique structure 2-CuO@C, which offers variety advantages: highly conductive matrix suppressing agglomeration grains, interconnected ensuring short transport length electrons, well-dispersed leading utilization rate, good mechanical properties resulting strong electrode integrity.