绣球花状CoAl双金属氢氧化物的合成及作为高性能超级电容器电极材料的研究
张悦 , 高春莉 , 徐迈 , 朱传高 , 王凤武
现代化工 ›› 2025, Vol. 45 ›› Issue (2) : 129 -135.
绣球花状CoAl双金属氢氧化物的合成及作为高性能超级电容器电极材料的研究
Synthesis of hydrangea-like CoAl bimetallic hydroxides as electrode material for high-performance supercapacitor
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。
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.
超级电容器 / 绣球花状 / CoAl-LDHs / 层状双氢氧化物
supercapacitor / hydrangea-like structure / CoAl-LDHs / layered double hydroxides
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国家自然科学基金(22078121)
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