Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering , Tongji University , Shanghai 200092 , China.
Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, CAS Center for Excellence in Nanoscience , Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215123 , China.
ACS Appl Mater Interfaces. 2018 Oct 31;10(43):37233-37241. doi: 10.1021/acsami.8b12486. Epub 2018 Oct 19.
Flexible fiber-shaped supercapacitors hold promising potential in the area of portable and wearable electronics. Unfortunately, their general application is hindered by the restricted energy densities due to low operating voltage and small specific surface area. Herein, an all-solid-state fiber-shaped asymmetric supercapacitor (FASC) possessing ultrahigh energy density is reported, in which the positive electrode was designed as Na-doped MnO nanosheets on carbon nanotube fibers (CNTFs) and the negative electrode as MoS nanosheet-coated CNTFs. Owing to the excellent properties of the designed electrodes, our FASCs exhibit a large operating potential window (0-2.2 V), a remarkable specific capacitance (265.4 mF/cm), as well as an ultrahigh energy density (178.4 μWh/cm). Moreover, the devices are of outstanding mechanical flexibility.
柔性纤维状超级电容器在便携式和可穿戴电子领域具有广阔的应用前景。然而，由于工作电压低和比表面积小，其能量密度受到限制，这阻碍了它们的广泛应用。在此，我们报道了一种具有超高能量密度的全固态纤维状不对称超级电容器（FASC），其中正极设计为掺杂 Na 的 MnO 纳米片负载在碳纳米管纤维（CNTFs）上，而负极设计为 MoS 纳米片包覆的 CNTFs。由于所设计电极的优异性能，我们的 FASCs 具有大的工作电位窗口（0-2.2 V）、显著的比电容（265.4 mF/cm）以及超高的能量密度（178.4 μWh/cm）。此外，这些器件还具有出色的机械柔韧性。
