Issue 5, 2017

The synergistic effect achieved by combining different nitrogen-doped carbon shells for high performance capacitance

Abstract

Ellipsoid nitrogen-doped hollow carbon shells with different nitrogen contents and electrical conductivities were prepared using a simple calcination method by regulating the calcination temperature. Although a high nitrogen content promotes pseudocapacitance, it reduces the electrical conductivity of carbon, causing loss of capacitance. The best rate performance was achieved by a mixture of two types of ellipsoid nitrogen-doped hollow carbon shells, in which one contains a higher level of nitrogen with lower conductivity and higher pseudocapacitance, while the other contains a relatively lower level of nitrogen with higher conductivity. The enhanced performance can be explained by the synergistic effect of one component providing high pseudocapacitance and the other component serving as a highly electrically conductive network, which leads to activation of “nitrogen” to enhance pseudocapacitance performance. The mixed material showed a specific capacitance of 156.9 F g−1 at a high current density of 10 A g−1, with no degradation after 10 000 cycles.

Graphical abstract: The synergistic effect achieved by combining different nitrogen-doped carbon shells for high performance capacitance

Supplementary files

Article information

Article type
Communication
Submitted
18 Nov 2016
Accepted
15 Dec 2016
First published
15 Dec 2016

Chem. Commun., 2017,53, 857-860

The synergistic effect achieved by combining different nitrogen-doped carbon shells for high performance capacitance

J. Hu, J. Yang, Y. Duan, C. Liu, H. Tang, L. Lin, Y. Lin, H. Chen and F. Pan, Chem. Commun., 2017, 53, 857 DOI: 10.1039/C6CC09211J

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