摘要
通过水热法制备了一种单质镍掺杂Co_(3)O_(4)(Ni/Co_(3)O_(4))的粉末,用伏安特性循环法研究了其电化学性能,同时根据第一性原理从原子尺度和电子结构的角度探究了Ni和Co_(3)O_(4)的掺杂机理。首先合成Ni/Co_(3)O_(4)粉末;其次对合成的材料结构及性能进行XRD和SEM表征分析,研究不同钴源及同一钴源不同钴镍比对制备的镍Ni/Co_(3)O_(4)形貌的影响;最后在不同缺陷和不同掺杂的影响下,建立准确的材料性能预测模型,揭示了修饰电极掺杂改性的微观机理。结果表明,不同钴源均制备出了花状形貌的Ni/Co_(3)O_(4)复合材料,电化学性能测试得到其比电容为670F/g;第一性原理计算所得掺杂机理,揭示了电化学修饰的Ni/Co_(3)O_(4)复合电极较大提高了材料的导电性能。
The Ni-doped nitrous oxide powder was successfully prepared by the hydrothermal method,and its electrochemical characteristic was tested by cycle voltammetry method.According to the first-principles,the doping mechanism of Ni and Co_(3)O_(4) was explored from the perspectives of atomic scale and electronic structure.That is,firstly,Ni/Co_(3)O_(4) was synthesized.Secondly,the structure and properties of the synthesized materials were characterized by X-ray diffraction and SEM,and the effects of different cobalt sources and different cobalt-nickel ratios of the same cobalt source on the morphology of the prepared Ni/Co_(3)O_(4) were investigated.Finally,the experiment established an accurate prediction model influenced by different defects and different doping,revealing the microscopic mechanism of doping modification in connection with modified electrodes.The results showed that Ni-doped Co_(3)O_(4) composites with flower-shaped morphology were prepared by different cobalt sources.The electrochemical performance test indicated that the specific capacitance was 670F·g-1.Furthermore,the doping mechanism calculated by first-principles calculation revealed that the electrochemically modified electrode greatly improved the electrical conductivity of the new electrode material.
作者
张玉新
李勇
尹鹏程
徐佳瑞
张瑞珠
Zhang Yuxin;Li Yong;Ying Pengcheng;Xu Jiarui;Zhang Ruizhu(School of Materials Science and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045;Henan Engineering Technology Research Center,Zhengzhou 450045)
出处
《化工新型材料》
CAS
CSCD
北大核心
2023年第12期183-187,共5页
New Chemical Materials
基金
第三批智汇郑州1125·聚才计划——创新紧缺人才(郑政[2018]-45号-15)
2023年度河南省高等学校重点科研项目([2022]150)。
