【摘 要】
:
Nanosized nickel oxide powders were prepared by thermal decomposition of the nickel citrate gel precursors. The thermal decomposition and powder materials deriv
【机 构】
:
School of Materials Science and Engineering,R&D Center
【出 处】
:
武汉理工大学学报(材料科学版)(英文版)
论文部分内容阅读
Nanosized nickel oxide powders were prepared by thermal decomposition of the nickel citrate gel precursors. The thermal decomposition and powder materials derived from calcination of these gel precursors with various ratios of citric acid (CA) to nickel at different temperatures and times were characterized by thermal analysis (TG/DTA), scanning electron microscopy (SEM), x-ray diffraction (XRD), and measurement of specific surface area (BET) with porosity analyses. The optimized processing conditions of calcination temperature 400℃ for 1 hour with the CA/Ni ratio of 1.2,were determined to produce the nanosized nickel oxide powders with a high specific surface area of 181 m2/g,nanometer particle sizes of 15-25 nm,micro-pore diameter distribution between 4-10 nm.The capacitance characteristics of the nanosized nickel oxide electrode in various concentrations of KOH solutions were studied by the cyclic voltammetry (CV) exhibiting both a double-layer capacitance and a faradaic pseudocapacitance.The nanosized nickel oxide electrode shows a high cyclic stability and is promising for high performance electrochemical capacitors.
其他文献
在山田河流域利用SWAT模型对循环灌溉稻田和畜牧生产系统的流域特征进行调查.在茨城县地区土地利用呈现典型的景观镶嵌式.谷地中的稻田循环灌溉系统沿河岸在低处修建,森林、
基于疲劳裂纹尖端的应力和应变以及高强铝合金中不同尺度第二相性态对其延性的影响,建立了高强铝合金中粗大第二相、中间尺度第二相以及细小时效强化相性态与其疲劳裂纹扩展
在载玻片或ITO涂覆的玻璃上采用化学热解法沉积CdS固体薄膜,沉积温度在350~540℃之间.部分制备的CdS薄膜进行200~600℃的退火热处理.由SEM,AFM和XRD分析测量退火热处理前后的Cd
平板式中温固体氧化物燃料电池(ITSOFC)的密封材料在工作温度下,与其接触的电池材料应具备以下特性:(1)气密性;(2)尺寸稳定性;(3)热匹配性;(4)化学稳定性;(5)绝缘性.采用SiO2
施工项目管理是为使项目实现所要求的质量、所规定的时限、所批准的费用预算,所进行的全过程、全方位的规划、组织、控制与协调.项目管理的目标界定了项目管理的几大控制,即
A novel polyarylene sulflde, polyarylene sulfide sulfone imide, was polymerized with a new monomer (Dichlorodiimide) and sodium sulflde by taking high temperatu
ZnS nano-particles with average sizes of 10 nm and 5 nm were fabricated by sol-gel method, and their pressure-induced phase transformations were in-situ examine
LiNi0.5Mn1.5O4 was prepared under different cooling conditions. The electrochemical properties of LiNi0.5Mn1.5O4 prepared under different cooling conditions wer
Combining with the technology of self-compacting concrete, self-stressing concrete and concrete-filled steel tube, we can get self-compacting and self-stressing
Plasma arc welding was used to join SiCp/Al composite with titanium as alloying filler material. Microstructure of the weld was characterized by an optical micr