Yuvaraj Subramanian, Karthikeyan Kaliyappan, Kalpana Dharmalingam, Lee Yun Sung, Selvan Ramakrishnan Kalai
Solid State Ionics and Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India.
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada.
J Colloid Interface Sci. 2016 May 1;469:47-56. doi: 10.1016/j.jcis.2016.01.060. Epub 2016 Jan 27.
Hierarchically structured spherical CuBi2O4 particles were prepared using a facile hydrothermal method without using a surfactant over various hydrothermal reaction periods. The prepared CuBi2O4 samples were examined via X-ray diffraction (XRD), which confirmed the formation of a tetragonal crystal structure. The morphological features were analyzed using field emission scanning electron microscopy (FESEM), which elucidated the construction of the hierarchical microspherical CuBi2O4 particles. The plausible growth mechanism of the hierarchical structure was explained in terms of a time-dependent synthesis process and its crystal structure. The uniform hierarchical CuBi2O4 microspheres were used to fabricate a Li-ion hybrid capacitor (Li-HC) along with activated carbon (AC), the generated device delivers a stable specific capacitance of 26.5 F g(-1) over 1500 cycles at a high current density of 1000 mA g(-1) and a capacity retention of ∼86%. The AC/CB2 Li-ion hybrid cell exhibits high energy density and power density values of 24 W h kg(-1) and 300 W kg(-1), respectively.
采用简便的水热法，在不使用表面活性剂的情况下，在不同水热反应时间内制备了具有分层结构的球形CuBi2O4颗粒。通过X射线衍射（XRD）对制备的CuBi2O4样品进行了检测，证实形成了四方晶体结构。用场发射扫描电子显微镜（FESEM）分析了其形态特征，阐明了分层微球形CuBi2O4颗粒的结构。根据时间相关的合成过程及其晶体结构解释了分层结构可能的生长机制。将均匀的分层CuBi2O4微球与活性炭（AC）一起用于制造锂离子混合电容器（Li-HC），所制备的器件在1000 mA g(-1)的高电流密度下1500次循环中提供26.5 F g(-1)的稳定比电容，容量保持率约为86%。AC/CB2锂离子混合电池分别表现出24 W h kg(-1)和300 W kg(-1)的高能量密度和功率密度值。
