Water-promoted zeolitic imidazolate framework-67 transformation to Ni-Co layered double hydroxide hollow microsphere for supercapacitor electrode material

作者：Wang, Peiyuan; Li, Yannan; Li, Shaodan; Liao, Xiangqiang; Sun, Shumin^*

来源：Journal of Materials Science: Materials in Electronics , 2017, 28(13): 9221-9227.

DOI：10.1007/s10854-017-6656-5

• HIGH-PERFORMANCE SUPERCAPACITORS
• ASYMMETRIC SUPERCAPACITOR
• CARBON NANOTUBE
• ENERGY-STORAGE
• NANOSPHERES
• NANOFLAKES
• NANOSHEETS
• FABRICATION
• STABILITY
• COMPOSITE

Hollow Ni-Co layered double hydroxide (LDH) was synthesized with rhombic dodecahedral zeolitic imidazolate framework-67 (ZIF-67) as self-sacrificed template and cobalt precursor. Water was found to be very important role on the formation of Ni-Co LDH hollow microstructure. As a supercapacitor electrode material, the obtained hollow Ni-Co LDH delivered a high specific capacitance of 1530 F g(-1) at the current density of 1.0 A g(-1) and good cycle performance, which can be ascribed to its hollow mesoporous structure composed of the Ni-Co LDH nanosheets and high specific surface area. Combined with the AC negative electrodes, the assembled asymmetric supercapacitors performed an energy density of 27.5 Wh kg(-1) at the power density of 375 W kg(-1).

• 出版日期2017-7
• 单位郑州轻工业大学