Aimed at improving the electric efficacy of supercapacitor, we designed a novel binder and conductive agent‐free electrode material by integrating varying amounts of aluminum into ultrathin nanosheets of NiCo layer double hydroxide on nickel foam via a one step hydrothermal treatment. We investigated the remarkable impact of Al on the morphology and electrical performance of NiCo₂Al_x-OH. A transfiguration occurred from β-phase of NiCo₂–OH to α-phase of NiCo₂Al_x-OH with the introduction of Al in NiCo–OH. The NiCo₂Al_0.5-OH electrode has 1570 F g⁻¹ specific capacitance at a current density of 2 A g⁻¹. A high performance aqueous asymmetric supercapacitor (NiCo₂Al_0.5-OH//AC) was designed with NiCo₂Al_0.5-OH as the positive electrode. This device demonstrated an excellent energy density of 56.8 W h kg⁻¹ at 618 W kg⁻¹ power density and 98% capacitance retention over 6000 cycles at a current density of 20 A g⁻¹.

为了提高超级电容器的电效率，我们设计了一种新颖的无粘合剂和无导电剂的电极材料，通过一步水热处理将不同量的铝整合到泡沫镍泡沫的NiCo层双氢氧化物超薄纳米片中。我们研究了Al对NiCo ₂ Al _x -OH的形貌和电性能的显着影响。甲变身从发生β镍钴的-PHASE ₂ -OH到α镍钴的-PHASE ₂的Al _X -OH与镍钴-OH引入Al组成。NiCo ₂ Al _0.5 -OH电极具有1570 F g ^-1电流密度为2 A g ^-1时的比电容。设计了以NiCo ₂ Al _0.5 -OH为正极的高性能水性不对称超级电容器（NiCo ₂ Al _0.5 -OH // AC）。该器件 在618 W kg ^-1功率密度下表现出56.8 W h kg ^-1的出色能量密度，在20 A g ^-1的电流密度下在6000次循环中具有98％的电容保持率。