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Sujet de stage / Master 2 Internship

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Controlled growth of aligned carbon nanotubes on metal supports for application to energy storage

Contact: PINAULT Mathieu, , mathieu.pinault@cea.fr, +33 1 69 08 91 87
Summary:
Control the synthesis of aligned CNT carpets (length, alignment ...) on metal supports (Al sheets or alloys). Understand the growth mechanisms by conducting CNT/ Al interface and in-situ analyzes
Possibility of continuation in PhD: Non
Deadline for application:16/04/2020

Full description:
The aerosol-assisted CVD (Chemical Vapor Deposition) method leads to obtain dense arrays of aligned carbon nanotubes (CNTs), whose applications are promising, in particular in the field of supercapacitor electrodes for electrochemical storage of energy [1-2]. As part of a collaborative project we developed the controlled growth of aligned CNTs metal current collectors for the elaboration of supercapacitor electrodes which in some cases requires a lowering of the CNT growth temperature below 650 °C. The objective of the project is to control the synthesis of vertically aligned CNT on thin metal current collectors (Al) before associating them with other active materials (carbon, conductive polymers) during the project. The approach will consist in adjusting the synthesis parameters (temperature, gas, nature of the precursors or substrate ...) in order to control the characteristics of the CNTs formed (alignment, length ...). The effect of post-treatments applied to the VACNT/Al collectors will also be studied. Particular attention will be paid to the control of the diameter and the density followed by electron microscopic analysis (SEM and TEM) and on the effect of these variations of morphologies and structures of the aligned CNTs on their electrochemical performances.

[1] S. Lagoutte et al, Electrochimica Acta, 130, (2014), 754–765
[2] P. Boulanger et al., Journal of Physics: Conference Series 429 (2013) 012050
[3] F. Nassoy et al., Nanomaterials, 9, (2019), 1590
Technics/methods used during the internship:
CVD, SEM, TEM, TGA, Raman, electrochemistry

Laboratory
Tutor of the internship

 

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