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Cobalt nickel nitride coated by a thin carbon layer anchoring on nitrogen-doped carbon nanotube anodes for high-performance lithium-ion batteries

Zou, R; Xu, M; He, SA; Han, X; Lin, R; Cui, Z; He, G; ... Parkin, IP; + view all (2018) Cobalt nickel nitride coated by a thin carbon layer anchoring on nitrogen-doped carbon nanotube anodes for high-performance lithium-ion batteries. Journal of Materials Chemistry A , 6 (40) pp. 19853-19862. 10.1039/c8ta08537d. Green open access

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Abstract

Cobalt nickel nitrides coated by a thin carbon layer anchoring on nitrogen-doped carbon nanotubes, named NiCo2N@C-NCNT nanocomposites, were obtained by a facile fabrication method. The work reveals that the NiCo2N structures possess extensive Li+ channels and high electrical conductivity for the rapid electron/ion transfer in lithium-ion batteries (LIBs). These materials were applied as anodes for the first time, and a nanobattery was constructed and examined using a transmission electron microscope (TEM) to directly verify the in situ structural evolution during lithiation/delithiation processes. The results show a small dimensional expansion of the NiCo2N@C-NCNT nanocomposites during the lithiation process; this is due to the disciform expansion of the lithiated NiCo2N nanoparticles which cover the surface of the NCNTs. It was found that some of the lithiated NiCo2N nanoparticles moved along the surface of the NCNTs and entered the NCNTs-thus acting to 'protect' themselves. Moreover, electrodes composed of interconnected NCNTs alleviate the volumetric expansion of NiCo2N@C-NCNT nanocomposites. The NiCo2N@C-NCNT nanocomposite electrode exhibits excellent lithium storage properties in electrochemical tests in coin cell configurations. This material synthesis route and 'self-protection' mechanism provide the basis of a design strategy for developing effective electrode materials in LIBs and a broader sphere of metal-ion batteries.

Type: Article
Title: Cobalt nickel nitride coated by a thin carbon layer anchoring on nitrogen-doped carbon nanotube anodes for high-performance lithium-ion batteries
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c8ta08537d
Publisher version: https://doi.org/10.1039/c8ta08537d
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10061160
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