Molybdenum disulfide grafted titania nanotube arrays as high capacity retention anode material for lithium ion batteries

Abstract

Titania nanotube arrays (TNAs) were grown by anodic oxidation method, and molybdenum disulfide (MoS 2 ) grafted TNAs have been synthesized via one-step hydrothermal process. The MoS 2 grafted TNAs (MoS 2 / TNAs) when employed as an anode material in lithium ion battery, exhibited excellent areal specific capacity (*430 lAh cm -2 ) at current density of 50 lA cm -2 , which is 33% higher as compared to the pure anatase TNAs and 55% higher as compared to MoS 2 . Moreover, the capacity loss per cycle of MoS 2 /TNAs (*0.21%) was significantly lower than anatase TNAs (*1.47%), suggesting an increase of capacity retention.

Graphene foam as a stable anode material in lithium‐ion batteries

“…A cathodic scan shown in peaks at 0.4, 1.75, and 2.5 V showed the solid electrolyte interface layer formation, which shows best correlation with discharge and charge curves. 26,27,41 The value at 0.4 V in reduction peak indicates the lithium intercalation into the active material. Similarly, in the anodic scan at 0.25, 0.5, and 1.25 V is because of extraction of lithium.…”

“…16 Graphene is another allotrope of carbon, and it is a monatomic carbon network material with hexagonal lattice structure. Graphene has been widely studied in supercapacitors, 10,17 solar cells, 18,19 fuel cells, [20][21][22] lithium-ion batteries, [23][24][25][26][27][28] and other fields due to its high conductivity, high specific surface area, excellent mechanical strength, and chemical stability.…”