绒球状β-氢氧化镍微米球的可控合成及其电化学性能

摘要

The novel self-assembled pompon-like β-Ni ( OH ) 2 microspheres ( P1 ) was synthesized for the first time, by the hydrothermal reaction of Ni(NO3)2 with the assistance of sodium poly(4-styrene-sulfonate)(PSS) and triblock copolymer Pluronic(P123) as the morphological controling surfactants. The structures and morphology were characterized by XRD, SEM and TEM. The electrochemical prop-erties of P1 were studied. The results showed that P1 exhibited excellent capacitance behavior with cou-lombic efficiency of 1 214 F · g-1 at a charge/discharge current density of 1 A · g-1 and an almost 90% coulombic efficiency after 1 000 cycles.%首次报道通过一种聚苯乙烯磺酸钠(PSS)和三嵌段共聚物(P123)辅助的水热法,以Ni(NO3)2为原料,合成了新颖的绒球状β-氢氧化镍微米球(P1),其结构和形貌经X-射线衍射、扫描电镜和透射电镜表征。电化学测试结果表明：P1具有良好的电化学性质,在1 A·g-1电流密度下,电容量达1214 F·g-1,经过1000次循环后其容量可保持90%以上。