Nickel-organic Frameworks with Hierarchical Flowers Structure Fabricated by Surfactant-assisted Solvothermal Method for High-performance Supercapacitors
Yi Wu, Xiangpeng Ding, Yumei Luo, Fen Xu, Lixian Sun, Jianhao Lao, Xiaohui Qin, Dan Cai, Yu Wang, Qingqing Yin, Tao Wang, Kexiang Zhang, Bin Li, Huanzhi Zhang, Yongjin Zou
Abstract
In this work, Ni-MOF (R-160) with a hierarchical flower-like structure is fabricated by a facile solvothermal method with surfactant assistance. Benefiting from its structure, R-160 has a very high specific surface area and a large number of exposed active sites. Electrochemical research results show that the electrochemical performance of R-160 prepared with sodium dodecyl sulfate (SDS) is superior to that of B-160 prepared without SDS assistance. For instance, the specific capacitance of B-160 is only 808 F g -1 at a current density of 1 A g -1 . Nevertheless, the specific capacitance of R-160 reaches 1036 F g -1 under the same conditions, which is 28.2% higher than that of B-160. Moreover, the energy density of an asymmetric device assembled with R-160 and AC is 38.3 W h kg -1 at a power density of 749.9 W kg -1 .