Ni(OH)2负极材料的十二烷基硫酸钠辅助制备及其储锂性能

作者：Li Yanwei; Luo Kang; Yao Jinhuan^*

来源：Chinese Journal of Materials Research, 2023, 37(6): 453-462.

DOI：10.11901/1005.3093.2022.267

• anode materials
• homogeneous precipitation method
• inorganic non-metallic materials
• lithium-ion batteries
• nickel hydroxide
• sodium dodecyl sulfate

α-Ni(OH)2 materials with micro/nano hierarchical structure were prepared by a facile homogeneous precipitation method with sodium dodecyl sulfate (SDS) as accessory ingredient. It was found that the introduction of SDS can refine the grain size of α-Ni(OH)2 and facilitate the formation of micro/nano hierarchical morphology with a more open structure as evidenced by XRD, SEM, FT-IR, TGA, and XPS analysis. Results of electrochemical test demonstrate that the α-Ni(OH)2 sample synthesized with the n(SDS)/n(Ni2+) of 2∶10 exhibits the best lithium ions storage performance. After 40 cycles at the current density of 2 A·g-1 the α-Ni(OH)2 sample maintained a specific capacity of 800 mAh·g-1; even at the high current density of 3 A·g-1 it still delivered a reversible specific capacity of 710 mAh·g-1. Moreover, it shows a significant pseudo-capacitive effect during discharge/charge processes (the pseudo-capacitive contribution to the total stored charge is as high as 84.2% at 0.9 mV·s-1). ? 2023 Chinese Journal of Materials Research.

• 单位
  桂林理工大学