采用六水合硝酸镍为镍源,通过一步水热法制备了Ni(OH)2/活性碳纤维(ACF)复合材料,并对材料的结构和电化学性能进行研究.结果表明:Ni(OH)2主要以纳米片结构生长在ACF表面,当金属离子Ni2+浓度为10 mmol/L时,纳米片在ACF表面形貌规整、分散均匀,厚度约为20 nm,且纳米片之间具有丰富的孔隙结构;复合材料其相对ACF(1043 m2/g)具有更高的比表面积,达到了1352 m2/g;电化学性能测试表明:复合材料在电流密度0.5 A/g时的比电容高达905 F/g,在电流密度5 A/g时的比电容仍有630 F/g,通过循环充放电1000次,其比电容保持率仍有85.7 %,表明复合材料具有较好的倍率性和循环稳定性.%Ni(OH)2/ACF composite was prepared by one-step hydrothermal method using nickel nitrate hexahydrate as nickel source. The microstructure and electrochemical performances of the obtained composites were studied. The experimental results showed that Ni(OH)2mainly growed on the surface of ACF. The best effect on the composite could be found When the concentration of metal ion Ni2+was 10 mmol/L. The nanosheet had rich pore structure with the thickness of about 20nm, which poseessed uniform surface morphology dispersed on ACF; Ni(OH)2/ACF has a higher specific surface area than ACF(1043 m2/g), reaching 1352 m2/g. The composite has the best electrochemical performance with the optimal process conditions were as follows: Ni2+10 mmol/L, reaction temperature 150 ℃, reaction time 10 h. the specific capacitance was 905 F/g at the current density of 0.5 A/g, and the specific capacitance increased by 6.75 times than ACF (134 F/g) ;The specific capacitance was still 630 F/g at the current density of 5 A/g. The specific capacitance retention rate was still 85.7 % at the current density of 0.5 A/g for the cycle of charge and discharge 1000 times, indicating that the composite has better rate and cycle stability.
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