Facile preparation of a zinc-based alloy composite as a novel anode material for rechargeable lithium-ion batteries

摘要: Abstract We report a new Zn-based nanocomposite anode material (Zn-Ti-C) for lithium-ion batteries synthesized by thermal treatment and high energy mechanical milling process. X-ray diffraction high-resolution transmission electron microscopy revealed the formation of active Zn nanoparticles finely dispersed in hybrid titanium carbide (TiC) carbon matrix. Electrochemical analyses show that TiC buffer matrix significantly contributed to improved performance electrode mitigating volume changes during charge/discharge processes. Furthermore, we optimized stoichiometric ratio Ti terms specific capacity, cycling performance, rate capability presence carbon. The with 2:1 atomic (ZnTi(2:1)-C) exhibited best cycle life, gravimetric capacity 363.6 mAh g −1 volumetric 472.7 mAh cm −3 after 300 cycles (78.1% retention). At this ratio, Zn-Ti-C consistently showed measurements up 3000 mA g (85% its at 100 mA g ). Therefore, our composite is promising alternative negative batteries.