Mn掺杂ZnCo2O4纳米片阵列的制备及电化学性能研究

Synthesis and Electrochemical Performances of Mn Doped ZnCo2O4 Nanosheet Arrays

通过水热合成再煅烧的方法在泡沫镍表面生长出了Mn掺杂的ZnCo2O4纳米片阵列。利用XRD、SEM、EDS-面扫描、XPS对样品的结构/形貌和掺入的Mn元素的分布情况进行了表征。然后,再进一步对样品进行了循环伏安曲线、恒电流充放电和循环稳定性的测试。结果表明,样品在电流密度为3 mA/cm2时,比电容达到了2 134.1 F/g;在电流密度为10 mA/cm2时,循环1 000圈,电容保持率为98.59%。因此,合成的样品比电容较高且循环稳定,是一种较为理想的超级电容器的电极材料。

Mn doped ZnCo2O4 nanosheet arrays were synthesized on Ni foam via a hydrothermal method followed by a calcination process.The structural,morphological and distribution of Mn in ZnCo2O4 nanosheet arrays have been confirmed via XRD,SEM,EDS mapping and XPS,respectively.The cyclic voltammetry,galvanostatic charge/discharge and cycling performance experiments were carried out,subsequently.Results showed that the fabricated sample exhibited a specific capacitance as high as 2 134.1 F/g at a current density of 3 mA/cm2 and retained 98.59% of initial capacitance after 1 000 cycles at current density of 10 mA/cm2.Due to its high specific capacitance and stable cycling performance,the Mn doped ZnCo2O4 nanosheet arrays on Ni foam was an ideal electrode material for super capacitor.