NiCo-LDH与醋糟衍生碳复合材料的制备及其在超级电容器中的应用

Preparation of NiCo-LDH/vinegar residue-derived carbon composite and its application in supercapacitors

以废弃醋糟为碳源,通过氢氧化钾活化制备多孔性、高比表面积的醋糟衍生碳,再采用水热法制备出双金属氢氧化物/醋糟衍生碳(NiCo-LDH/C)复合电极材料。利用循环伏安(CV)、恒流充放电(GCD)、XRD以及场发射扫描电镜(SEM)等测试方法表征复合材料的形貌和性能。结果表明,在10 A/g的电流密度下该材料的比电容可达915 F/g;1000次充放电后电容量仍保持82.5%。NiCo-LDH/C复合材料在能量存储领域具有巨大应用潜力。

To develop a high performance and low cost energy storage material,vinegar residue-derived carbon with porous and high specific surface area is prepared by using spent vinegar residue as carbon source,and potassium hydroxide as activation agent.Bimetal hydroxide/vinegar residue-derived carbon(NiCo-LDH/C)composite electrode material is prepared via hydrothermal method.The morphology and properties of the composite are characterized by means of CV,GCD,XRD and SEM.It is shown that the specific capacitance of the composite reaches 915 F·g-1 at a current density of 10 A·g-1,and its capacitance retains 82.5%after 1,000 times of charge and discharge tests.It is suggested that NiCo-LDH/C composite is of great application potential in the energy storage field.