State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China.
Nanotechnology. 2019 Feb 22;30(8):085404. doi: 10.1088/1361-6528/aaf520. Epub 2018 Nov 30.
Porous carbons derived from metal-organic frameworks (MOFs) are promising materials for a number of energy- and environment-related applications. To integrate the powder MOFs-derived carbon into feasible engineered materials, a facile strategy to fabricate integrated flexible film is developed by growing MOFs nanoparticles on polyimide electrospun nanofibers, followed by calcination, to fabricate freestanding carbon nanofiber membranes decorated with porous carbon. Then vertically polyaniline nanowire arrays are uniformly deposited on the hierarchical porous carbon substrates by in situ polymerization. Thanks to the good distribution of MOFs-derived porous carbon on carbon nanofibers and the compact configuration interwoven by conducting polymers, the designed hybrid electrode could be used directly as a freestanding electrode for supercapacitors, which displayed a high specific capacitance of 1268 F g. The assembled flexible solid-state supercapacitor based on the integrated electrodes demonstrated a high volumetric capacitance of 1973 mF cm and a good capacitance retention of 84.9% after 10 000 cycles, which could power a commercial light emitting diode. This strategy may shed light on the design of MOFs-based flexible materials for practical applications of supercapacitors and other electrochemical devices.
由金属有机骨架（MOFs）衍生的多孔碳是许多与能源和环境相关的应用的有前途的材料。为了将粉末 MOFs 衍生碳整合到可行的工程材料中，通过在聚酰亚胺静电纺纳米纤维上生长 MOFs 纳米颗粒，然后进行煅烧，开发了一种简便的策略来制造带有多孔碳的独立柔性薄膜，以制造独立的碳纳米纤维膜。然后通过原位聚合均匀地在分层多孔碳基底上沉积垂直的聚苯胺纳米线阵列。由于 MOFs 衍生的多孔碳在碳纳米纤维上的良好分布以及由导电聚合物交织的紧密结构，设计的混合电极可以直接用作超级电容器的独立电极，其比电容高达 1268 F g。基于集成电极的组装式柔性固态超级电容器表现出 1973 mF cm 的高体积电容和 10000 次循环后 84.9%的良好电容保持率，可点亮商用发光二极管。该策略可能为基于 MOFs 的柔性材料在超级电容器和其他电化学器件的实际应用中的设计提供启示。
