Journal
CHEMISTRY OF MATERIALS
Volume 28, Issue 5, Pages 1453-1461Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.5b04845
Keywords
-
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2009-0093814]
- National Research Foundation of Korea (NRF) - Korean Government (MSIP) [2015R1A5A7037615]
Ask authors/readers for more resources
Niobium pentoxide (Nb2O5) is an interesting material with applications in Li battery and hybrid capacitor electrodes. The main limitation of this material is its low electronic conductivity. In this study, H-2 treatment is introduced to address this issue. Self-ordered Nb2O5 films were prepared by anodizing Nb foils and subsequently treating them in a H-2 atmosphere. Electron microscopy revealed that the Nb2O5 film had a hierarchical porous microstructure consisting of macropores and mesopores. X-ray diffraction analysis showed that the crystal structure could be changed by the H-2 treatment compared to the air treatment. Oxygen deficiencies in the Nb2O5 film were induced by the treatment, as confirmed by X-ray photoelectron spectroscopy. Mott Schottky analysis was performed and indicated that the electronic conductivity of the material was significantly improved by the oxygen deficiencies. Thus, the electrochemical Li storage kinetics in porous Nb2O5 films can be greatly enhanced by H-2 treatment.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available