Herein, composite material cotton carbon/Co-Ni-Mn LDH (CCO/CNM) combining the cotton carbon and the metal organic framework (ZIF-67) material is successfully prepared depending on solvothermal method and calcination. Simultaneously, the impact of load upon the sacrifice template CCO/ZIF-67 and electrochemical performance of CCO/CNM are further studied, and find that the optimized CCO/Co-Ni-Mn LDH-2 (CCO/CNM-2) composite electrode exhibits excellent electrochemical properties. In the case of a current density of 1 A g⁻¹, the high specific capacitance of CCO/CNM-2 electrode materials can be calculated as 2995.56F g⁻¹. In addition, when the current density is set to 10 A g⁻¹, the capacitance value can still maintain 91.8% of the initial capacitance after experiencing 5000 cycles of charging and discharging. Moreover, the assembled CCO/CNM-2// activated carbon (AC) asymmetric supercapacitor shows a superior energy density of 104.98Wh kg⁻¹ at power density of 800 kW kg⁻¹, and 79.3% of the capacitance retention rate at current density of 10 A g⁻¹ after 10,000 charge–discharge cycles. Finally, three light emitting diodes (LEDs) are successfully lit by connecting with two CCO/CNM-2//AC asymmetric supercapacitor.

在此，通过溶剂热法和煅烧，成功制备了棉碳与金属有机骨架材料（ZIF-67）相结合的复合材料棉碳/Co-Ni-Mn LDH（CCO/CNM）。同时，进一步研究了负载对牺牲模板CCO/ZIF-67和CCO/CNM电化学性能的影响，发现优化后的CCO/Co-Ni-Mn LDH-2（CCO/CNM-2）复合电极表现出优异的电化学性能。在电流密度为1 A g ^-1的情况下，CCO/CNM-2电极材料的高比电容可计算为2995.56F g ^-1。此外，当电流密度设为 10 A g ^-1，经过5000次充放电循环后，电容值仍能保持初始电容的91.8%。此外，组装的CCO/CNM-2//活性炭（AC）非对称超级电容器在800 kW kg ^{-1 的}功率密度下显示出104.98Wh kg ^-1的优异能量密度，以及79.3%的电流密度下的电容保持率10,000 次充放电循环后为 10 A g ^-1。最后，通过连接两个 CCO/CNM-2//AC 非对称超级电容器，成功点亮了三个发光二极管 (LED)。