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Porous Silicon Nanotube Arrays as Anode Material for Li-Ion Batteries

Abstract : We report the electrochemical performance of Si nanotube vertical arrays possessing thin porous sidewalls for Li-ion batteries. Porous Si nanotubes were fabricated on stainless steel substrates using a sacrificial ZnO nanowire template method. These porous Si nanotubes are stable at multiple C-rates. A second discharge capacity of 3095 mAh g(-1) with a Coulombic efficiency of 63% is attained at a rate of C/20 and a stable gravimetric capacity of 1670 mAh g(-1) obtained after 30 cycles. The high capacity values are attributed to the large surface area offered by the porosity of the 3D nanostructures, thereby promoting lithium-ion storage according to a pseudocapacitive mechanism.
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https://hal-amu.archives-ouvertes.fr/hal-01416711
Contributor : Laurence Tortet <>
Submitted on : Wednesday, December 14, 2016 - 5:22:08 PM
Last modification on : Thursday, August 22, 2019 - 5:10:05 PM

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Alexander T. Tesfaye, Roberto Gonzalez, Jeffery L. Coffer, Thierry Djenizian. Porous Silicon Nanotube Arrays as Anode Material for Li-Ion Batteries. ACS Applied Materials & Interfaces, Washington, D.C. : American Chemical Society, 2015, 7 (37), pp.20495 - 20498. ⟨10.1021/acsami.5b05705⟩. ⟨hal-01416711⟩

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