CAJ | 학술논문

采用电化学共沉积技术在泡沫镍基体上直接制备掺杂Zn的Ni(OH)_2电极,研究了乙醇-水体系下不同镍锌比电沉积溶液制备的电极材料的电容特性.通过XRD、SEM、EDS等测试方法对制备的电极材料进行微结构表征,并用恒流充放电、循环伏安法系统地考察其电化学性能.结果表明:所制备的电极材料为掺杂Zn的α-Ni(OH)_2.当镍锌比为1:0.007 5时,循环伏安测试(扫描速率是1 mV·s~(-1))α-Ni(OH)_2电极的比电容达1 906.09 F·g~(-1).经100次恒流充放电循环后比电容衰减仅0.09%,说明电极材料具有良好的稳定性.在7.5 mA·cm~(-2)电流密度下,比电容达313.88 F·g~(-1).
채용전화학공침적기술재포말얼기체상직접제비참잡Zn적Ni(OH)_2전겁,연구료을순-수체계하불동얼자비전침적용액제비적전겁재료적전용특성.통과XRD、SEM、EDS등측시방법대제비적전겁재료진행미결구표정,병용항류충방전、순배복안법계통지고찰기전화학성능.결과표명:소제비적전겁재료위참잡Zn적α-Ni(OH)_2.당얼자비위1:0.007 5시,순배복안측시(소묘속솔시1 mV·s~(-1))α-Ni(OH)_2전겁적비전용체1 906.09 F·g~(-1).경100차항류충방전순배후비전용쇠감부0.09%,설명전겁재료구유량호적은정성.재7.5 mA·cm~(-2)전류밀도하,비전용체313.88 F·g~(-1).
The Ni (OH)_2 doping with Zn was directly deposited on the surface of foam nickel by electrochemical deposition technology. Capacitance performance of electrode material was studied in the ethanol and water with different Ni/Zn ratios of electrodepositing solution. The characterization of the Ni ( OH )_2 electrode was studied by u-sing X-ray diffraction(XRD) , scanning electron microscopy(SEM), energy -dispersive spectrometry (EDS) , cyclic voltammetry ( CV) and the constant charge - discharge. The results show that the product is α-Ni( OH )_2 doping with Zn. The specific capacitance(1 906. 09 F·g~(-1) at scan rate 1 mV ·s~(-1)) of α-Ni (OH)_2 electrode is obtained at Ni/Zn ratio = 1:0.0075. The α-Ni(OH)_2 electrode has excellent charge -discharge cycle stability (0.09 % loss of the specific capacitance is found at the 100th charge -discharge cycles). The specific capacitance of α-Ni (OH)_2 electrode can reach 313. 88 F·g~(-1) at a current density of 7. 5 mA·cm~(-2).