The β-Ni(OH)₂ nanoparticles and their nanohybrid with 5% CNTs have been synthesized by facile hydrothermal and ultra-sonication method. The structural and phases analysis of the prepared sample was investigated by XRD and FT-IR analysis. The effect of CNTs on the electrical and electrochemical properties of the nanohybrid was determined via current-voltage (I-V) and electrochemical measurements. The observed higher electrical conductivity (1.37 × 10⁻² Sm⁻¹) of the β-Ni(OH)₂@CNTs nanohybrid than the Ni(OH)₂ nanoparticles (1.2 × 10⁻⁸ Sm⁻¹) was due to the effective interaction between the CNTs and Ni(OH)₂ nanoparticles. Moreover, the higher gravimetric capacitance (724 Fg⁻¹) and lower charge transfer resistance (Rct) of the nanohybrid was also observed. This was due to the synergistic effects between the electrolytic double-layer capacitance (EDLC) of the CNTs and pseudocapacitance (PSCs) of the Ni(OH)₂ nanoparticles (NPs). The evenly distributed CNTs not only act as a capacitive supplement but also support the faradic reaction in the Ni(OH)₂ nanoparticles to enrich the gravimetric capacitance. The observed results express the potential of the β-Ni(OH)₂@CNTs nanohybrid as a positive electrode for modern energy storage devices.

采用简便的水热超声法合成了β-Ni（OH）₂纳米粒子及其含5％碳纳米管的纳米杂化物。通过XRD和FT-IR分析研究了所制备样品的结构和相分析。通过电流-电压（IV）和电化学测量来确定CNT对纳米杂化物的电和电化学性质的影响。观察到的β-Ni（OH）₂ @CNTs纳米杂化物比Ni（OH）₂纳米粒子（1.2×10 ^-8 Sm ^-1）更高的电导率（1.37×10 ^-2 Sm ^-1）碳纳米管与Ni（OH）₂之间的相互作用纳米粒子。此外，还观察到纳米杂化物的更高的重量电容（724 Fg ^-1）和更低的电荷转移电阻（Rct）。这是由于CNT的电解双层电容（EDLC）与Ni（OH）₂纳米颗粒（NPs）的伪电容（PSC）之间的协同效应。均匀分布的CNT不仅充当电容性补充，而且还支持Ni（OH）₂纳米粒子中的法拉第反应，以丰富重量电容。观察到的结果表明，β-Ni（OH）₂ @CNTs纳米杂化物作为现代能量存储设备的正极具有潜力。