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    Anisotropic Carbon Nanotube Structures with High Aspect Ratio Nanopores for Li-Ion Battery Anodes

    Year: 2021

    Journal: ACS Appl. Nano Mater., Volume 4, JUN 25, page 6299–6305

    Authors: Jessl, Sarah; Engelke, Simon; Copic, Davor; Baumberg, Jeremy J.; De Volder, Michael

    Organizations: EPSRC [1470335, EP/L016087/1]; Marie Sklodowska-Curie Actions MSCA-IF [660351]; ERC [866005-MIGHTY]; [EP/L027151/1]; [EP/N016920/1]

    Keywords: carbon nanotubes; colloidal lithography; chemical vapor deposition; high-aspect ratio structures; submicron pores

    Technological advances in membrane technology, catalysis, and electrochemical energy storage require the fabrication of controlled pore structures at ever smaller length scales. It is therefore important to develop processes allowing for the fabrication of materials with controlled submicron porous structures. We propose a combination of colloidal lithography and chemical vapor deposition of carbon nanotubes to create continuous straight pores with diameters down to 100 nm in structures with thicknesses of more than 300 mu m. These structures offer unique features, including continuous and parallel pores with aspect ratios in excess of 3000, a low pore tortuosity, good electrical conductivity, and electrochemical stability. We demonstrate that these structures can be used in Li-ion batteries by coating the carbon nanotubes with Si as an active anode material.
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