Surface modification of Nb2O5-doped Li4Ti5O12 anode materials by atmospheric Ti(III) reduction
- Surface modification of Nb2O5-doped Li4Ti5O12 anode materials by atmospheric Ti(III) reduction
- 김슬기; 최선희; 김주선; 문주호
- Issue Date
- The effects of atmospheric annealing on electrochemical
performance for Nb2O5-doped Li4Ti5O12 anode materials have been
investigated. The annealing in Ar atmosphere of Nb2O5-doped Li4Ti5O12
suppressed the capacity fade at high rate of charge-discharge condition by
virtue of the enhanced exchange reaction at electrode/electrolyte interface.
Under reducing conditions the surface of Nb2O5 doped Li4Ti5O12 was
primarily reduced to increase the density of Ti3+ ion which contributes to
expand Li4Ti5O12 lattice. Such microstructural and electrical modification at
Li4Ti5O12 surface decreased the polarization resistance for exchange
reaction at electrode/electrolyte interface in case of combined doping and
annealing. We demonstrated the general recipe which is annealing in Ar
atmosphere is used for decreasing the resistance of exchange reaction by
intrinsic surface modification.
- Appears in Collections:
- KIST Publication > Conference Paper
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.