祝贺李新华老师指导研究生在journal of alloys and compounds发表学术论文-威尼斯人888

标题：an extra-long-life supercapacitor based on co3o4/nico2o4/nio/c&s composite by decomposition of co/ni-based coordination complex

abstact：single-material electrodes do not satisfy the demands of high-performance supercapacitors. to exploit the advantages of both oxides and carbon-based materials, a tightly packed co3o4/nico2o4/nio/c&s nanocomposite is fabricated by sintering a co/ni-based coordination complex precursor at 400 c. the composites and basic components are characterized using various techniques, namely, x-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, brunauereemmetteteller specific surface area analysis, and elemental analysis. the electrochemical performance is analyzed by cyclic voltammetry, galvanostatic charge/discharge cycling, and electrochemical impedance spectrometry. a uniform nanocomposite was found to be formed of nico2o4, nio, and co3o4 nanoparticles, incompletely carbonized c, and incompletely vulcanized s. when used as supercapacitor electrodes, the synthesized composites show extra-long cycling stability (>20,000 cycles) during the charge/discharge process. this improvement in the cycle life of the composites is attributed to its highly stable structure. the roles of c and s in forming a stable structure are investigated. the results show that a supercapacitor with electrodes made from the as-prepared co3o4/nico2o4/nio/c&s composite will be promising for commercial applications.

原文链接:

https://doi.org/10.1016/j.jallcom.2018.06.153