Co(OH)2/MWCNTs复合物的室温固相合成及其电容性能

摘要

Co(OH)2/MWCNTs composite was prepared by room-temperature solid-state reaction method/The product's crystal shape,composition,and morphology were characterized by XRD,FT-IR,and SEM.Results indicated that β-Co(OH)2particles prepared by solid-state reaction were uniformly coated on multi-walled carbon nanotubes(MWCNTs).Electrochemical tests showed that both the specific capacitance and cycle performance of the obtained composite were effectively improved. The specific capacitance became constant gradually and a high number of 385 F/g could be obtained for the Co(OH)2/MWC-NTs composite with the MWCNTs mass fraction of 10% after 200 charge-discharge cycles.The capacitance increased by about 8% after 1 000 cycles, that was ,415 F/g could be achieved, showing its excellent cyclic stability.%采用室温固相反应法制备了Co(OH)2/MWCNTs复合物.借助XRD、FT-IR以及SEM对产物的晶形、组成及形貌进行了表征.结果表明,所得复合物中β-Co(OH)2颗粒较好地覆盖于MWCNTs的表面.电化学测试结果表明,复合物的比容量和循环性能均得到有效改善,MWCNTs的质量分数为10％时,充放电至200次时其比容量可达385 F/g并逐趋恒定,1 000次后其比容量增加了8％,达到415 F/g,表现出良好的循环稳定性.