Hierarchical porous nitrogen-rich carbon nanospheres with high and durable capabilities for lithium and sodium storage.

Published

Journal Article

To improve the energy storage performance of carbon-based materials, considerable attention has been paid to the design and fabrication of novel carbon architectures with structural and chemical modifications. Herein, we report that hierarchical porous nitrogen-rich carbon (HPNC) nanospheres originating from acidic etching of metal carbide/carbon hybrid nanoarchitectures can be employed as high-performance anode materials for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The structural advantages of HPNC nanospheres are that the exceptionally-high content of nitrogen (17.4 wt%) can provide abundant electroactive sites and enlarge the interlayer distance (∼3.5 Å) to improve the capacity, and the large amount of micropores and mesopores can serve as reservoirs for storing lithium/sodium ions. In LIBs, HPNC based anodes deliver a high reversible capacity of 1187 mA h g-1 after 100 cycles at 100 mA g-1, a great rate performance of 470 mA h g-1 at 5000 mA g-1, and outstanding cycling stabilities with a capacity of 788 mA h g-1 after 500 cycles at 1000 mA g-1. In SIBs, HPNC based anodes exhibit a remarkable reversible capacity of 357 mA h g-1 at 100 mA g-1 and high long-term stability with a capacity of 136 mA h g-1 after 500 cycles at 1000 mA g-1.

Full Text

Duke Authors

Cited Authors

  • Ma, L; Chen, R; Hu, Y; Zhu, G; Chen, T; Lu, H; Liang, J; Tie, Z; Jin, Z; Liu, J

Published Date

  • October 2016

Published In

Volume / Issue

  • 8 / 41

Start / End Page

  • 17911 - 17918

PubMed ID

  • 27722438

Pubmed Central ID

  • 27722438

Electronic International Standard Serial Number (EISSN)

  • 2040-3372

International Standard Serial Number (ISSN)

  • 2040-3364

Digital Object Identifier (DOI)

  • 10.1039/c6nr06307a

Language

  • eng