Doping via metal/nonmetal/metalloid dopants in to the crystal structural surface of cobalt oxide nanoparticles are promising for creating electroactive supercapacitors with excellent electrochemical performance. Herein, we fabricate boron doped cobalt oxide nanoparticles (B@Co₃O₄) via a facile co-precipitation route for supercapacitor applications. The incorporation of boron into cobalt oxide nanoparticles (3M B@Co₃O₄) brings a ∼4.2-fold increase in a specific surface area (548.126 m²g^-1), decrease in band gap energy and reduced in crystalline size. Consequently, the B doped Co₃O₄ NPs displays a maximum specific capacitance of 998.12 F/g, which is ∼1.50-fold increased as compared to 668.79 F/g of the pristine Co₃O₄ NPs at current density 1.5mA/cm² and scan rate 2mV/s in 1M KOH electrolyte solution. Moreover, 3M B@Co₃O₄ NPs demonstrates excellent power density 711.14W/kg and high energy density 195.96Wh/kg Wh/kg. Hence, we believe that boron doped cobalt oxide nanoparticles are a promising electroactive material for the supercapacitive applications.

中文翻译：

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增强硼掺杂钴氧化物纳米颗粒对超级电容器应用的电化学活性


通过金属/非金属/准金属掺杂剂掺杂到氧化钴纳米颗粒的晶体结构表面，有望制造具有优异电化学性能的电活性超级电容器。在本文中，我们通过简单的共沉淀路线制造了用于超级电容器应用的硼掺杂氧化钴纳米颗粒 （B@Co₃O₄）。将硼掺入氧化钴纳米颗粒 （3M B@Co₃O₄） 中，比表面积增加了约 4.2 倍 （548.126 m^{2 g-1}），带隙能量降低，晶体尺寸减小。因此，在 1M KOH 电解质溶液中，B 掺杂 Co₃O₄ NPs 的最大比电容为 998.12 F/g，与原始 Co₃O₄ NPs 的 668.79 F/g 相比增加了 ∼1.50 倍1.50倍。此外，3M B@Co₃O₄ NPs 表现出优异的功率密度 711.14W/kg 和高达 195.96Wh/kg Wh/kg 的高能量密度。因此，我们相信硼掺杂的氧化钴纳米颗粒是一种很有前途的超电容应用的电活性材料。