Carbon coated anatase TiO2 mesocrystals enabling ultrastable and robust sodium storage
Journal
Journal of Power Sources
Journal Volume
359
Pages
64-70
Date Issued
2017
Author(s)
Abstract
Nanoporous anatase TiO2 mesocrystals with tunable architectures and crystalline phases were successfully fabricated in the presence of the butyl oleate and oleylamine. Especially, the introduced surfactants served as a carbon source, bring a uniform carbon layer (about 2¡V8 nm) for heightening the electronic conductivity. The carbon coated TiO2 mesocrystals assembled from crystalline tiny subunits have more space sites for sodium-ion storage. When the material was applied as an electrode material in rechargeable sodium-ion batteries, it exhibited a superior capacity of about 90 mA h g?1 at 20 C (1 C = 168 mA g?1) and a highly reversible capacity for 5000 cycles, which is the longest cycle life reported for sodium storage in TiO2 electrodes. ? 2017 Elsevier B.V.
Subjects
Carbon coating layer
Electrochemical property
Mesocrystal
Sodium-ion batteries
TiO2
Type
journal article