摘要
通过液相共沉淀法及高温热解法制备了裂开球形氧化镍氧化铜复合物.采用了X射线衍射光谱(XRD)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)表征了该材料的结构.采用恒流充放电法研究了制备的NiO-CuO复合物在6 mol·L-1KOH溶液中的电化学行为.实验结果表明:这种裂开球形复合氧化物由氧化镍、氧化铜组成.该材料在1 A·g-1的电流密度下所得复合氧化物单电级比电容为735 F·g-1,并且在580次充放电循环后,容量保持率为98%,远远高于氧化镍(351 F·g-1)和氧化铜(262 F·g-1)的比容量.
Abstract Split sphere-like NiO-CuO composites were successfully prepared by thermal decomposi- tion of mixed oxalate precursors in air. The synthesized NiO-CuO composites were characterized by X-ray diffraction （XRD）, Scanning electron microscopy （SEM）, and Transmission electron microscopy （TEM）. The capacitive behavior of NiO-CuO composites was studied by galvanostatic charge-discharge studies in 6 mol · L^-1 KOH solution at different current density. The results show that the split sphere- like composites at 350 ℃ show good capacitive behavior with a specific capacitance of 735 F· g^-1 and the capacitance loss after 580 cycles is only 2% , which was far higher than pure NIO（351 F ·g^- ） and pure CUO（262 F ·g^-1）.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2014年第5期37-42,89,共7页
Journal of Natural Science of Hunan Normal University
基金
国家自然科学基金资助项目(21071153)
