CAJ | 학술논문

本文通过电沉积法在泡沫镍上沉积了绿色（ Co， Ni）氢氧化物前驱体，并通过退火处理制备了纳米NiCo2 O4电极材料。利用扫描电子显微镜（ SEM）和透射电子显微镜（ TEM）表征了生长在泡沫镍上的纳米NiCo2 O4电极材料的形貌特征，成分和显微结构。通过对这些样品进行恒流密度充放电以及循环伏安测试对纳米NiCo2 O4电极材料进行了电化学性能评价。结果表明，电化学性能最佳的纳米NiCo2 O4生长厚度为2?80μm，纳米片长度在390～785 nm之间，该电极材料在1 mA／cm2的充放电电流密度下比容量达到了1?4 F／cm2，在30 mA／cm2电流密度下比容量依然保持了0?68 F／cm2。该样品在5 mA／cm2的充放电电流密度下循环充放电2000次之后依然保持了94％的初始比容量，显示出了较高的循环稳定性。
본문통과전침적법재포말얼상침적료록색（ Co， Ni）경양화물전구체，병통과퇴화처리제비료납미NiCo2 O4전겁재료。이용소묘전자현미경（ SEM）화투사전자현미경（ TEM）표정료생장재포말얼상적납미NiCo2 O4전겁재료적형모특정，성분화현미결구。통과대저사양품진행항류밀도충방전이급순배복안측시대납미NiCo2 O4전겁재료진행료전화학성능평개。결과표명，전화학성능최가적납미NiCo2 O4생장후도위2?80μm，납미편장도재390～785 nm지간，해전겁재료재1 mA／cm2적충방전전류밀도하비용량체도료1?4 F／cm2，재30 mA／cm2전류밀도하비용량의연보지료0?68 F／cm2。해양품재5 mA／cm2적충방전전류밀도하순배충방전2000차지후의연보지료94％적초시비용량，현시출료교고적순배은정성。
In this paper, green ( Co, Ni ) hydroxide precursor was firstly electrodeposited on Ni foam, and then yields NiCo2 O4 electrode material was prepared through thermal treatment. SEM and TEM were used to characterize the morphology, composition and structure of the electrode material prepared under different conditions. The electrochemical performance of the as?prepared electrode materials was measured by galvanostatic tests and cyclic voltammetry. The results showed that the outstanding electrochemical performance was obtained when the thickness of NiCo2 O4 layer was 2?80 μm and the length of the nanosheets was between 390 nm and 785 nm. The corresponding electrode material delivered specific capacitance of 1?4 F/cm2 at current density of 1 mA/cm2 and still maintained 0?68 F/cm2 at current density of 30 mA/cm2 . The cyclic stability of the electrode was undertaken under current density of 5 mA/cm2 , and it still maintained 94% of initial capacitance after 2 000 cycles, indicating its excellent cyclic stability.