Jump to main content
Jump to site search

Issue 20, 2017
Previous Article Next Article

CNT-threaded N-doped porous carbon film as binder-free electrode for high-capacity supercapacitor and Li–S battery

Author affiliations

Abstract

A novel lightweight, free-standing, CNT-threaded nitrogen-doped porous carbon film (CNCF) has been synthesized as a binder-free electrode for supercapacitor and Li–S battery. The meticulous structural design of using CNT to thread the ZIF-8-derived porous carbon polyhedrons together endows the porous carbon thin film with nice flexibility, high surface area (645.2 m2 g−1), and hierarchical pore structure as well as good nitrogen doping (2.8 at%) and overall electrical conductivity. When used as binder-free electrode for a supercapacitor, the CNCF delivers a high specific capacitance of 340 F g−1 at 2 A g−1, long-term stability with a coulombic efficiency of 97.7% after 10 000 cycles at 20 A g−1, and high energy density of 21.1 W h kg−1 with a power density of 5000 W kg−1. It can also serve as an efficient sulfur host for the Li–S battery. The S@CNCF electrode exhibits a high discharge capacity of 926 mA h g−1 after 200 cycles at 1C, and 614 mA h g−1 after 1800 cycles with an ultra-low overall capacity decay of 0.02%/cycle with sulfur loading of 3 mg cm−2. Moreover, when the sulfur loading is increased to 6.9 mg cm−2, the electrode shows a high initial areal capacity of 7.3 mA h cm−2 and a volumetric capacity of 0.94 A h cm−3. This film holds promising potential for flexible or film-like high-energy storage systems.

Graphical abstract: CNT-threaded N-doped porous carbon film as binder-free electrode for high-capacity supercapacitor and Li–S battery

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Feb 2017, accepted on 18 Apr 2017 and first published on 18 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA01526G
Citation: J. Mater. Chem. A, 2017,5, 9775-9784
  •   Request permissions

    CNT-threaded N-doped porous carbon film as binder-free electrode for high-capacity supercapacitor and Li–S battery

    Y. Liu, G. Li, Z. Chen and X. Peng, J. Mater. Chem. A, 2017, 5, 9775
    DOI: 10.1039/C7TA01526G

Search articles by author

Spotlight

Advertisements