【摘要】 以L-精氨酸（L-Arginine）为结构导向剂,利用水热法合成由纳米片组装成的分等级β-Ni（OH）₂花状微球。采用XRD、SEM、TEM及N₂吸附脱附对样品的微观结构、表面特性及比表面积进行了表征,深入分析其合成机理,并通过循环伏安、充放电、交流阻抗等测试考察了该电极材料的电化学性能。结果表明,分等级β-Ni（OH）₂花状微球具有优异的电化学电容特性,在电流密度为5 m A/cm²时,β-Ni（OH）₂的比电容值高达1 048.5 F/g,500圈充放电循环后,其比电容仅衰减了9.2%,可见所制得样品是一种理想的超级电容器电极材料。更多还原

【Abstract】 Hierarchical β-Ni（OH）₂ flower-like microspheres with partial open gaps have successfully been prepared via a facile hydrothermal process with the assistance of L-arginine. The microstructure,surface properties,and specific surface area of the asprepared products have been characterized by means of XRD,SEM,TEM,and N₂ adsorption/desorption,respectively. The synthesis mechanism was also analyzed deeply. The electrochemical properties of the as-obtained products were investigated by cyclic voltammograms,galvanostatic charge/discharge curves,and electrochemical impedance spectroscopy. Results show that a maximum specific capacitance of 1 048. 5 F/g at the current density of 5 m A/cm² is obtained and the capacitance loss is only approximately9. 2% after 500 cycling tests. Therefore,the as-obtained product was a perfect electrode material of supercapacitor.更多还原