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Issue 5, 2017

Bottom-up synthesis of nitrogen-doped porous carbon scaffolds for lithium and sodium storage

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Abstract

Here we report an effective bottom-up solution-phase process for the preparation of nitrogen-doped porous carbon scaffolds (NPCSs), which can be employed as high-performance anode materials for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The as-obtained NPCSs show favorable features for electrochemical energy storage such as high specific surface area, appropriate pore size distribution (3.9 nm in average), large pore volume (1.36 cm3 g−1), nanosheet-like morphology, a certain degree of graphitization, enlarged interlayer distance (0.38 nm), high content of nitrogen (∼5.6 at%) and abundant electrochemically-active sites. Such a unique architecture provides efficient Li+/Na+ reservoirs, and also possesses smooth electron transport pathways and electrolyte access. For LIBs, the anodes based on NPCSs deliver a high reversible capacity of 1275 mA h g−1 after 250 cycles at 0.5 C (1 C = 372 mA g−1), and outstanding cycling stabilities with a capacity of 518 mA h g−1 after 500 cycles at 5 C and 310 mA h g−1 after 1500 cycles even at 10 C. For SIBs, the anodes based on NPCSs display a reversible capacity of 257 mA h g−1 at 50 mA g−1, and superior long-term cycling performance with a capacity of 191 mA h g−1 after 1000 cycles at 200 mA g−1.

Graphical abstract: Bottom-up synthesis of nitrogen-doped porous carbon scaffolds for lithium and sodium storage

Supplementary files

Article information


Submitted
22 Oct 2016
Accepted
13 Jan 2017
First published
13 Jan 2017

Nanoscale, 2017,9, 1972-1977
Article type
Paper

Bottom-up synthesis of nitrogen-doped porous carbon scaffolds for lithium and sodium storage

H. Lu, R. Chen, Y. Hu, X. Wang, Y. Wang, L. Ma, G. Zhu, T. Chen, Z. Tie, Z. Jin and J. Liu, Nanoscale, 2017, 9, 1972 DOI: 10.1039/C6NR08296C

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