Combining hierarchical nickel–cobalt oxides (NCO) with cost-effective glucose-based carbons could be attractive electrode materials for high-performance supercapacitor. The bimetallic nickel (Ni) and cobalt (Co) hydroxide was directly electrodeposited for 120, 180, 300, 480, and 600 s, respectively, on a conductive Ni foam as the NCO/Ni electrodes. The (NCO/Ni)-480 electrode showed the highest capacitance among NCO/Ni electrodes. Furthermore, an asymmetric supercapacitor (ASC) was assembled by utilizing (NCO/Ni)-480 as a positive electrode and glucose-based activated-carbon coated on Ni foam, (G-AC)/Ni, as a negative electrode in solid state carboxymethyl cellulose-lithium nitrate (CMC-LiNO₃) gel electrolyte. At the potential window of 1.5 V, the device exhibits a prominent energy density of 45.3 Wh kg⁻¹ at a power density of 0.743 kW kg⁻¹ (1 A g⁻¹) and excellent cycling stability of 89.7% of the initial capacity retention over 10,000 cycles. The outstanding electrochemical performances of the ASC can be ascribed to the synergistic effect of hierarchical Ni–Co oxides, mesoporous G-AC, three-dimensional Ni foam collector, and binder-free preparation, which facilitates a faster diffusion of the electrolyte ion into the electrode material and provides a stronger adhesion of active materials with the current collector.

分层镍钴氧化物（NCO）与具有成本效益的葡萄糖基碳的结合可能是高性能超级电容器的诱人电极材料。将双金属镍（Ni）和氢氧化钴（Co）分别直接电沉积120、180、300、480和600 s，作为NCO / Ni电极在导电的Ni泡沫上。（NCO / Ni）-480电极在NCO / Ni电极中显示出最高的电容。此外，通过使用（NCO / Ni）-480作为正极和涂覆在Ni泡沫上的葡萄糖基活性炭（G-AC）/ Ni作为固态负极组装了不对称超级电容器（ASC）羧甲基纤维素-硝酸锂（CMC-LiNO ₃）凝胶电解质。在1.5 V的电位窗口下，该器件的能量密度为45.3 Wh kg^-1的功率密度为0.743 kW kg ^-1（1 A g ^-1），在10,000次循环中具有优异的循环稳定性，占初始容量保持率的89.7％。ASC出色的电化学性能可归因于分层Ni-Co氧化物，介孔G-AC，三维Ni泡沫收集器和无粘结剂制备的协同作用，这有助于电解质离子更快地扩散到电极中。电极材料，并提供活性材料与集电器的更强附着力。