摘要
应用无模板水热法制备了由超薄氧化镍纳米片组装而成的具有分级结构的多孔氧化镍,SEM观察表明经煅烧氧化镍仍保持花状球形结构.电化学测试结果表明,扫速为20 mV.s-1时,其比电容值435 F.g-1,循环1000周期之后,电容值基本没有衰减;电流密度为10 A.g-1时,其比电容值为367 F.g-1.该材料是一种有应用价值的超级电容器材料.
A facile and template-free hydrothermal method is proposed to successfully synthesize porous NiO hierarchical structure,which is found to be assembled from ultrathin NiO nanosheets. As for electrochemical pseudocapacitor applications,the obtained material exhibits not only high specific capacitances of 435 F.g - 1 at 20 mV.s - 1 and 367 F.g - 1 at 10 A.g - 1 ,but also holds a good electrochemical stability over 1000 cycles at a current rate of 20 mV.s - 1 . These results suggest that the hierarchical structured porous NiO is a promising supercapacitor electrode material.
出处
《电化学》
CAS
CSCD
北大核心
2012年第2期151-156,共6页
Journal of Electrochemistry
基金
supported by 100 Talents Programme of the Chinese Academy of Sciences and National Natural Science Foundation of China(No.21101147)
关键词
超级电容器
氧化镍
分级结构
无模板
电化学稳定性
supercapacitor
NiO
hierarchical structure
template-free
electrochemical stability
