A novel and unique nickel-cobalt hydroxyfluorides (NiCo-HF) nanowires material is fabricated by one-pot solvothermal synthesis method for asymmetric supercapacitor. The synthesis mechanism and factors that influence the formation of the NiCo-HF nanowires have been further discussed. The as-prepared NiCo-HF electrode exhibits a high specific capacitance of 3,372.6 F g⁻¹, and the capacitance retention of 94.3% can be achieved at a high current density of 20 A g⁻¹ after 10,000 cycles. The outstanding electrochemical performance of the electrode can be attributed to the synergistic effect of the nanowires morphology and complicated redox process of active material. Furthermore, an asymmetric supercapacitor assembled with NiCo-HF nanowires as positive electrode and activated carbon as the negative electrode shows an ultrahigh energy density of 83.6 Wh kg⁻¹ at a power density of 379.4 W kg⁻¹ and an excellent cycling stability with 86.3% capacitance retention after 10,000 cycles, indicating that this novel material has great promise for potential application in energy storage device.

采用单锅溶剂热合成法制备了一种新颖独特的羟基氟化镍钴 (NiCo-HF) 纳米线材料，用于不对称超级电容器。进一步讨论了影响NiCo-HF纳米线形成的合成机理和因素。所制备的 NiCo-HF 电极具有 3,372.6 F g ^{-1的高比电容，在 20 A g -1}的高电流密度下可实现 94.3% 的电容保持率10,000 次循环后。该电极优异的电化学性能归因于纳米线形貌和活性物质复杂的氧化还原过程的协同作用。此外，以 NiCo-HF 纳米线为正极、活性炭为负极组装的非对称超级电容器在 379.4 W kg ^{-1的功率密度下表现出 83.6 Wh kg -1}的超高能量密度和 86.3% 的优异循环稳定性。 10,000 次循环后的电容保持率，表明这种新型材料在储能设备中具有巨大的潜在应用前景。