With SiO₂ spheres as the template and PPy as carbon precursor, a layer of amorphous carbon has been tightly coated on NiCoO₂-CoOOH hollow burr nanospheres, forming a unique double-shelled hollow burr nanospheres structure. Carbon@NiCoO₂-CoOOH presents a high discharge capacity (1334 mAh g⁻¹ at a current density of 100 mA g⁻¹), a stable cycling performance (912 mAh g⁻¹ at the 600th cycle at 200 mA g⁻¹), and a desirable rate capability when used as anode material for lithium-ion batteries. The outstanding electrochemical performance results from the synergy effect of the hollow burr nanosphere and the amorphous carbon shell. The hollow burr nanosphere endows NiCoO₂ and CoOOH with a high electrochemical activity and a good accommodation capability to volume change. The amorphous carbon shell remarkably reinforces the structure stability and electronic conductivity of NiCoO₂ and CoOOH.

以SiO ₂球为模板，PPy为碳前驱体，在NiCoO ₂ -CoOOH中空毛刺纳米球上紧密包覆一层无定形碳，形成独特的双壳中空毛刺纳米球结构。碳@ NiCoO ₂ -COOOH呈现高放电容量（毫安1334克^-1在100mA g的电流密度^-1），稳定的循环性能（912毫安克^-1在第600循环以200mA克^-1），以及用作锂离子电池负极材料时的理想倍率性能。优异的电化学性能来自空心毛刺纳米球和无定形碳壳的协同效应。中空的毛刺纳米球赋予NiCoO ₂和CoOOH较高的电化学活性，并且对体积变化具有良好的适应能力。非晶碳壳显着增强了NiCoO ₂和CoOOH的结构稳定性和电子导电性。