Doping is the most effective strategy to improve the electrochemical performance of supercapacitors. Herein, we report the doping effect of Magnesium on structural instability of Ni-Co LDHs as the supercapacitor electrode material. The morphology of different compositions of magnesium are studied. The derived material with the Ni:Mg ratio of 1:1 displayed an excellent specific capacity of 624 Cg⁻¹ at current density of 10 Ag⁻¹. Moreover, the specific capacity remained at 80% after 3000 cycles which suggest excellent cycle stability. An asymmetrc device was fabricated with N/M₂ as positive electrode and activated carbon cloth as negative electrode, which displayed a specific capacitance of 200 Fg⁻¹ at 0.25 Ag⁻¹ with the energy density of 28 Whkg⁻¹. The device showed the capacitance retention of about 99% after 1000 cycles at 1 Ag⁻¹. Therefore, improved structural integrity, makes this material a suitable candidate for supercapacitors.

掺杂是提高超级电容器电化学性能的最有效策略。在此，我们报道了镁对作为超级电容器电极材料的Ni-Co LDHs的结构不稳定性的掺杂作用。研究了镁不同组成的形态。Ni∶Mg比为1∶1的衍生材料在10 Ag ^-1的电流密度下显示出624 Cg ^-1的优异比电容。此外，在3000次循环后，比容量保持在80％，这表明优异的循环稳定性。一个asymmetrc装置用N / M制成₂作为正极和活性炭布作为负电极，其显示200 FG的特定电容^-1为0.25的Ag ^-1能量密度为28 Whkg ^-1。该器件在1 Ag ^-1下经过1000次循环后显示出约99％的电容保持率。因此，改善的结构完整性使该材料成为超级电容器的合适候选材料。