柔性超级电容器复合电极材料制备及电化学性能研究

Preparation and Electrochemical Performance Research of Composite Electrode Materials for Flexible Supercapacitors

摘要: 采用水热法和电沉积法制备了柔性碳布/镍钴铝层状双氢氧化物(NiCoAl-LDH/CC)复合材料电极，对通过这两种方法制备的样品的性能进行了系统比较，研究结果表明，与水热法相比，电沉积法在无粘结剂配置下，在相同的集流体性能下表现更优。具体而言，优化后的电沉积样品在电流密度为1 A/g时，实现了2322 F/g的质量比电容。在电压窗口ΔV = 1.75 V的条件下，这种柔性双电极装置在电流密度为1 A/g时的能量密度达到60.06 Wh/kg，平均功率密度为880 W/kg。值得注意的是，在高功率密度4380 W/kg的情况下，其能量密度仍保持在58.7 Wh/kg。在5 A/g电流密度下，5000次循环充放电后电容保持率为85.7%。

Abstract: Flexible carbon cloth/NiCoAl-layered double hydroxide (NiCoAl-LDH/CC) composite material electrodes were prepared by hydrothermal and electrodeposition methods. The performance of the samples prepared by these two methods was systematically compared. The research results show that, compared with the hydrothermal method, the electrodeposition method performs better in a binder-free configuration or under the same current collector performance. Specifically, the optimized electrodeposition sample achieved a mass-specific capacitance of 2322 F/g at a current density of 1 A/g. Under a voltage window of ΔV = 1.75 V, the energy density of this flexible dual-electrode device reached 60.06 Wh/kg and the average power density was 880 W/kg at a current density of 1 A/g. Notably, at a high power density of 4380 W/kg, its energy density remained at 58.7 Wh/kg. After 5000 cycles of charge and discharge at a current density of 5 A/g, the capacitance retention rate was 85.7%.