Hierarchical porous nitrogen-rich carbon monoliths via ice-templating: high capacity and high-rate performance as lithium-ion battery anode materials

Roberts, Aled D, Wang, Suxi, Li, Xu and Zhang, Haifei ORCID: 0000-0001-5142-5824 (2014) Hierarchical porous nitrogen-rich carbon monoliths via ice-templating: high capacity and high-rate performance as lithium-ion battery anode materials. JOURNAL OF MATERIALS CHEMISTRY A, 2 (42). pp. 17787-17796.

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Abstract

Hierarchical porous nitrogen-rich carbon monoliths were prepared from a polyacrylonitrile (PAN) precursor by employing a novel & facile ice-templating, thermal annealing and pyrolysis technique. The achieved carbon monoliths were characterised by scanning electron microscopy (SEM), Hg-intrusion porosimetry, thermogravimetric analysis (TGA), N2 gas-sorption, elemental analysis, X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD) and Raman spectroscopy. Electrochemical evaluation of the carbon materials as anodes for the rechargeable lithium-ion battery revealed an impressive stable reversible capacity as high as 745 mA h g−1 at a current density of 50 mA g−1. Incorporation of melamine (for further N-doping) and graphene into the carbon monoliths was achieved easily, and found to significantly enhance high rate performance – with a reversible capacity of about 300 mA h g−1 obtained at the ultra high current density of 10 A g−1.

Item Type:	Article
Depositing User:	Symplectic Admin
Date Deposited:	21 Nov 2017 14:05
Last Modified:	19 Jan 2023 06:50
DOI:	10.1039/c4ta02839b
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3012634