NiCo layered double hydroxides (LDHs) have attracted extensive attention in supercapacitors nowadays due to their ion insertable layer structure, however, improvement of their electrochemical energy storage performance is still a great challenge work. Herein, three-dimensional NiCo(NA)-LDH nanosheet networks with high mass-loading on an activated carbon cloth are prepared by electrodeposition using a mixed Ni/Co nitrate and acetate as reactants, which is denoted as NiCo(NA)-LDH. When the mass-loading is 16 mg cm⁻² and the current density is 10 mA cm⁻², the areal capacitance of NiCo(NA)-LDH@ACC electrode reaches 27.3 F cm⁻² and the specific capacitance is 1709 F g⁻¹ at 0.62 A g⁻¹, and the mass-loading is positively correlated with the capacitance performance. An asymmetric supercapacitor assembled by NiCo(NA)-LDH@ACC as the positive electrode and acid-etched carbon cloth as the negative electrode achieves a working potential window of 1.7 V and energy density of 2.24 mW h cm⁻² at a power density of 3.71 mW cm⁻², which are much higher than the previous reports of NiCo-LDH based supercapacitors. In addition, the prepared device shows an excellent cycle stability with 104% capacity retention after 10,000 cycles at 250 mA cm⁻².

如今，NiCo层状双氢氧化物（LDHs）由于其离子可插入层结构而在超级电容器中引起了广泛关注，但是，提高其电化学储能性能仍然是一项艰巨的工作。在此，通过使用硝酸镍/钴硝酸盐和醋酸盐的混合溶液作为反应物进行电沉积，制备了在活性炭布上具有高质量负载的三维NiCo（NA）-LDH纳米片网络。当质量加载是16毫克厘米^-2，电流密度为10mA厘米^-2，镍钴（NA）-LDH @ ACC电极达到的面积电容27.3˚F厘米^-2和比电容是1709 F G ^{- 1}在0.62 A g ^-1，而质量负载与电容性能呈正相关。由NiCo（NA）-LDH @ ACC作为正电极和酸蚀碳布作为负电极组装而成的不对称超级电容器在功率密度为时达到1.7 V的工作电势窗和2.24 mW h cm ^-2的能量密度。 3.71 mW cm ^-2，比以前基于NiCo-LDH的超级电容器的报道要高得多。另外，所制备的器件在250mA cm ^-2下10,000次循环后显示出优异的循环稳定性和104％的容量保持率。