Porous Silicon Nanotube Arrays as Anode Material for Li-Ion Batteries.
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.
Aix-Marseille University , CNRS, MADIREL Laboratory, UMR 7246, 13397 Marseille, France.|FR CNRS 3104, ALISTORE-ERI , Nantes, France.
Alexander T
AT
Tesfaye
Department of Chemistry, Texas Christian University , Fort Worth, Texas 76129, United States.
Roberto
R
Gonzalez
Department of Chemistry, Texas Christian University , Fort Worth, Texas 76129, United States.
Jeffery L
JL
Coffer
Aix-Marseille University , CNRS, MADIREL Laboratory, UMR 7246, 13397 Marseille, France.|FR CNRS 3104, ALISTORE-ERI , Nantes, France.|FR CNRS 3459, Réseau sur le Stockage Electrochimique de l'Energie (RS2E) , Paris, France.
Thierry
T
Djenizian
Li-ion batteries; ZnO nanowire templates; anode; porous silicon; silicon nanotube arrays