Despite the high specific capacities, the practical application of transition metal oxides as the lithium ion battery (LIB) anode is hindered by their low cycling stability, severe polarization, low initial coulombic efficiency, etc. Here, we report the synthesis of the NiO/Ni₂N nanocomposite thin film by reactive magnetron sputtering with a Ni metal target in an atmosphere of 1 vol.% O₂ and 99 vol.% N₂. The existence of homogeneously dispersed nano Ni₂N phase not only improves charge transfer kinetics, but also contributes to the one-off formation of a stable solid electrolyte interphase (SEI). In comparison with the NiO electrode, the NiO/Ni₂N electrode exhibits significantly enhanced cycling stability with retention rate of 98.8% (85.6% for the NiO electrode) after 50 cycles, initial coulombic efficiency of 76.6% (65.0% for the NiO electrode) and rate capability with 515.3 mA·h·g⁻¹ (340.1 mA·h·g⁻¹ for the NiO electrode) at 1.6 A·g⁻¹.

尽管具有高的比容量，但过渡金属氧化物的低循环稳定性，严重的极化作用，低的初始库伦效率等阻碍了过渡金属氧化物作为锂离子电池（LIB）阳极的实际应用。在此，我们报道了NiO /的合成在1％（体积）的O ₂和99％（体积）的N ₂的气氛中，用金属镍靶通过反应磁控溅射法制得的Ni ₂ N纳米复合薄膜。均匀分散的纳米Ni ₂ N相的存在不仅改善了电荷转移动力学，而且还有助于一次性形成稳定的固体电解质中间相（SEI）。与NiO电极相比，NiO / Ni ₂Ñ电极展品显著增强50个循环，的76.6％（65.0％，为的NiO电极）的初始库仑效率和速率能力与515.3毫安·h·克后循环用的98.8％保留率（85.6％的氧化镍电极）稳定性^{- 1}（340.1毫安·h·克^-1的氧化镍电极）在1.6 A·克^-1。