In the present work, a novel NiCoO₂ nanoparticle/amorphous carbon composite was synthesized through an intercalation-calcination process under very mild reaction conditions (400 °C, without high vacuum). The NiCoO₂/C composite possesses a unique 3D interconnecting petal-like architecture, together with appropriate compositing of NiCoO₂ nanoparticles. The distinctive nanostructure endows a high specific capacitance of 190.4 mAh g⁻¹ (equivalent conversion to 1713.7 F g⁻¹) at the current density of 1 A g⁻¹ (133.3 mAh g⁻¹ at 20 A g⁻¹) in a three-electrode system, using 3.0 M KOH as an aqueous electrolyte. And the remarkable cycling stability at a high current density of 10 A g⁻¹ (∼2% loss over 3000 charge-discharge cycles) has also been demonstrated. Moreover, the fabricated asymmetric supercapacitor using the NiCoO₂/C composite as the positive electrode material and activated carbon as the negative electrode material can deliver a relatively high energy density of 36.1 Wh kg⁻¹ and a power density of 8000 W kg⁻¹ under a high potential window of 0–1.6 V. The facile lattice orientation/confinement strategy described here is simple, of low cost, and eco-friendly, which makes the NiCoO₂/C composite a promising electrode material for supercapacitors.

在目前的工作中，在非常温和的反应条件（400°C，无高真空）下，通过插层-煅烧过程合成了新型的NiCoO ₂纳米颗粒/无定形碳复合材料。NiCoO ₂ / C复合材料具有独特的3D互连花瓣状架构，以及适当的NiCoO ₂纳米粒子合成。独特的纳米结构在1 A g ^-1的电流密度下（20 A g ^-1时的133.3 mAh g ^-1）具有190.4 mAh g ^-1的高比电容（等效转换为1713.7 F g ^-1）。）在三电极系统中，使用3.0 M KOH作为水性电解质。并且还证明了在10 A g ^-1的高电流密度下（在3000个充放电循环中损失约2％）的出色循环稳定性。此外，使用NiCoO制造非对称超电容器₂ / C复合材料作为正极材料和活性炭作为负极材料可提供36.1瓦公斤的相对高的能量密度^-1和8000的功率密度钨千克^-1下高电位窗口范围为0–1.6V。此处介绍的简便晶格取向/限制策略简单，成本低廉且对环境友好，这使得NiCoO ₂/ C复合材料有望成为超级电容器的电极材料。