Jump to main content
Jump to site search

Issue 18, 2019
Previous Article Next Article

Ultra-high performance of Li/Na ion batteries using N/O dual dopant porous hollow carbon nanocapsules as an anode

Author affiliations

Abstract

Carbon materials usually exhibit a low capacity, short cycle life and poor rate performance as anode materials for lithium ion batteries (LIBs) and sodium ion batteries (SIBs). It remains a great challenge to explore carbon materials for ultrafast lithium and sodium storage with both a high capacity and a long cycling stability. Herein, we report the fabrication of nitrogen (N)/oxygen (O) dual dopant hollow porous carbon nanocapsules that show a state-of-the-art electrochemical performance. If used as anodes for LIBs, at an ultrahigh current density of 30 A g−1, the carbon nanocapsules can be cycled up to 11 000 cycles with a considerable capacity retention of ∼310 mA h g−1. For sodium storage, they also demonstrate an ultrastable cycling performance with a reversible capacity of ∼150 mA h g−1 after 10 000 cycles at a high current density of 5 A g−1. The outstanding electrochemical performance can be ascribed to the synergistic effects from heteroatom doping and the unique sealed porous hollow characteristics of the nanocapsules. Theoretical calculations suggest that the sealed capsule structure leads to a excellent mechanical stability, which can tolerate fast lithium/sodium intercalation and extraction at ultrahigh current densities.

Graphical abstract: Ultra-high performance of Li/Na ion batteries using N/O dual dopant porous hollow carbon nanocapsules as an anode

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Dec 2018, accepted on 16 Mar 2019 and first published on 18 Mar 2019


Article type: Paper
DOI: 10.1039/C8TA12540F
J. Mater. Chem. A, 2019,7, 11117-11126

  •   Request permissions

    Ultra-high performance of Li/Na ion batteries using N/O dual dopant porous hollow carbon nanocapsules as an anode

    L. Wang, B. Lu, S. Wang, W. Cheng, Y. Zhao, J. Zhang and X. Sun, J. Mater. Chem. A, 2019, 7, 11117
    DOI: 10.1039/C8TA12540F

Search articles by author

Spotlight

Advertisements