【摘要】 采用一步热液法在泡沫镍表面均匀生长3D绣球花状结构CoAl-LDHs。对比了不同形貌的CoAl-LDHs对电化学性能的影响。结果表明，当电流密度为1 A/g时，绣球花状的CoAl-LDHs的比电容为982.2 F/g,比块状的CoAl-LDHs的比电容(251.1 F/g)大。将绣球花状的电极材料与活性炭(AC)组装为超级电容器CoAl-LDH//AC,得到的最大功率密度为1.58 kW/kg,最大能量密度达249.5 Wh/kg,同时循环5 000次后得到改性后的CoAl-LDH//AC的电流保持率为85.5%,比改性前的电流保持率(60.2%)有较大提升。更多还原

【Abstract】 A one-step hydrothermal method is utilized to uniformly grow 3D hydrangea-like CoAl-LDHs on the surface of nickel foam.The effects of different morphologies of CoAl-LDHs on their electrochemical properties are compared.Study results show that the specific capacitance of hydrangea-like CoAl-LDHs is 982.2 F·g^-1 under a current density of 1A·g^-1,which is larger than that of block-shaped CoAl-LDHs(251.1 F·g^-1).The prepared hydrangea-like electrode material is assembled together with activated carbon（AC） to form CoAl-LDH//AC supercapacitor, which obtains the maximum power density of 1.58 kW·kg^-1 and the maximum energy density of 249.5 Wh·kg^-1.The current retention of modified CoAl-LDH//AC is 85.5% after 5 000 cycles, comparing with the 60.2% before modification.更多还原