Layered double hydroxides (LDHs) are electrode materials with high specific capacity due to their structure which has a tunable interlayer spacing, however, the disadvantages of their low conductivity and electrochemically limited sites prevent their application in supercapacitors. In this study, we synthesized a high electrochemical performance electrode material with a core-shell structure based on hierarchical nickel nanowires (core) and NiCo LDHs nanosheets (shell). First, hierarchical nickel nanowires, h-Ni NWs, were prepared by the reduction of Ni²⁺ ions by hydrazine N₂H₄. Then with the hydrothermal method, the hierarchical nickel nanowires were coated with NiCo LDHs to improve the electrical conductivity of the latter. The electrochemical results showed that the NiCo LDHs@h-Ni NWs electrode had a specific capacity of 1486 C/g at a current density of 1 A/g in 6 M KOH electrolyte with excellent capacity retention (89.7%) after 10,000 charge-discharge cycles at 20 A/g. Due to the synergistic interaction between nickel nanowires and NiCo LDHs which provides excellent conductivity, durability, efficient mesoporous network, and suitable channels for fast ion/electron transfer. In addition, a hybrid supercapacitor (HSC) was fabricated by combining the NiCo LDHs@h-Ni NWs electrode (battery type) with activated carbon (EDLC). The fabricated device provided a high energy density of 72.22 Wh/kg at 800 W/kg, and a maximum power density of 16 kW/kg, the HSC provided an energy density of 50.44 Wh/kg and outstanding cycling stability (88.1% retention after 10,000 cycles).

层状双氢氧化物（LDHs）由于其结构具有可调的层间距而成为具有高比容量的电极材料，然而，它们的低电导率和电化学位点有限的缺点阻碍了它们在超级电容器中的应用。在这项研究中，我们合成了一种具有基于分层镍纳米线（核）和 NiCo LDHs 纳米片（壳）的核壳结构的高电化学性能电极材料。首先，通过用肼 N ₂ H _{4还原 Ni} ^{2+离子制备分层镍纳米线 h-Ni NWs}. 然后采用水热法，将分层镍纳米线涂上 NiCo LDHs，以提高后者的导电性。电化学结果表明，NiCo LDHs@h-Ni NWs 电极在 6 M KOH 电解质中在 1 A/g 的电流密度下具有 1486 C/g 的比容量，在 10,000 次充放电后具有出色的容量保持率（89.7%）周期为 20 A/g。由于镍纳米线和 NiCo LDHs 之间的协同相互作用，它提供了优异的导电性、耐久性、高效的介孔网络和适合快速离子/电子转移的通道。此外，通过将 NiCo LDHs@h-Ni NWs 电极（电池型）与活性炭（EDLC）结合来制造混合超级电容器（HSC）。制造的设备在 800 W/kg 时提供了 72.22 Wh/kg 的高能量密度，