Abstract
Layered double hydroxides (LDHs) capture wide attention due to their unique properties. However, the easy agglomeration and limited exposure of surface active sites seriously limit the further improvement of their electrochemical performances. Herein, we report a strategy to improve the supercapacitor performance of hollow NiCo-LDHs by facile morphology engineering. By simply adopting multifunctional microbial derived carbon (M-FC) as an inducer, which can not only regulate the size of the outside nanosheets and the internal cavity, but also synergize with NiCo-LDHs via its excellent electrical conductivity and the supercapacitor feature. The optimal NiCo-LDHs/M-FC electrode material exhibits a high specific capacitance (1877 F g-1 at 1 A g-1) and excellent rate ability (up to 10 A g-1). The assembled asymmetric supercapacitor device using NiCo-LDHs/M-FC positive electrode and activated carbon negative electrode exhibits an energy density of 106.7 Wh kg-1 at the power density of 1333.8 W kg-1 at 2 mA cm-2, and still retained 80 Wh kg-1 at the power density of 9931 W kg-1 at 15 mA cm-2. This work demonstrates a facile strategy to regulate the microstructure and properties of LDHs.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
