The limited energy density of supercapacitors poses significant constraints on their practical applications. To address this issue,in this study,the hydrothermal method was used to grow an anthracene-based covalent organic framework(DaTp-COF)in-situ on the surface of graphene oxide(GO),and a novel DaTp/rGO composite electrode material was prepared. The structure,morphology,and electrochemical properties of the material were systematically characterized. The results reveal that the DaTp/rGO composite possesses a unique hierarchical porous structure with micropores,mesopores,and macropores. Meanwhile,the electron-withdrawing effect of the anthracene groups in the structure induces apseudocapacitive response of the Schiff base groups. Benefiting from this,in a three-electrode system with a 0.5mol·L-1 sulfuric acid electrolyte,the specific capacitance of DaTp/rGO electrode reaches 251F·g-1 at a current density of 1A·g-1,which is significantly higher than that of rGO electrode material. In the ionic liquid electrolyte system,the DaTp/rGO electrode only exhibits the characteristics of electric double layer capacitance. However,owing to its excellent hierarchical pore structure,the electrode's specific capacitance is still as high as 158F·g-1 at a current density of 1A·g-1,and the capacitance retention rate is 78.82% after 10000 cycles. This study used the in-situ growth method to achieve the synergy between DaTp-COF and rGO,providing new ideas for the research and development of high-performance supercapacitor electrode materials,and helping supercapacitors break through their application limitations.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |