Abstract
The effects of atmospheric annealing on electrochemical performance for Nb2O5-doped Li4Ti5O12 anode materials have been investigated. The annealing of Nb2O 5-doped Li4Ti5O12 in Ar-gas suppressed the capacity fade, under the condition of a high charge-discharge rate, by virtue of an enhanced exchange reaction at the electrode/electrolyte interface. Under Ar-gas, Nb2O5-doped Li4Ti 5O12 was primarily reduced to increase the density of Ti3+ ions. This caused expansion of the Li4Ti 5O12 lattice, but had little impact on Li-ion diffusion into the lattice. When concurrent doping and annealing induced such compositional and electrical modification of Li4Ti5O 12, the polarization resistance of exchange reactions at the electrode/electrolyte interface decreased. Therefore, we have demonstrated that annealing in Ar-gas is capable of decreasing the resistance of exchange reactions at the electrode/electrolyte interface.
| Original language | English |
|---|---|
| Pages (from-to) | 8869-8874 |
| Number of pages | 6 |
| Journal | Ceramics International |
| Volume | 40 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry
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Effects of atmospheric Ti (III) reduction on Nb2O 5-doped Li4Ti5O12 anode materials for lithium ion batteries. / Kim, Seul Ki; Kwon, Eun Seok; Kim, Tae Heui; Moon, Joo Ho; Kim, Joosun.
In: Ceramics International, Vol. 40, No. 6, 01.01.2014, p. 8869-8874.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effects of atmospheric Ti (III) reduction on Nb2O 5-doped Li4Ti5O12 anode materials for lithium ion batteries
AU - Kim, Seul Ki
AU - Kwon, Eun Seok
AU - Kim, Tae Heui
AU - Moon, Joo Ho
AU - Kim, Joosun
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The effects of atmospheric annealing on electrochemical performance for Nb2O5-doped Li4Ti5O12 anode materials have been investigated. The annealing of Nb2O 5-doped Li4Ti5O12 in Ar-gas suppressed the capacity fade, under the condition of a high charge-discharge rate, by virtue of an enhanced exchange reaction at the electrode/electrolyte interface. Under Ar-gas, Nb2O5-doped Li4Ti 5O12 was primarily reduced to increase the density of Ti3+ ions. This caused expansion of the Li4Ti 5O12 lattice, but had little impact on Li-ion diffusion into the lattice. When concurrent doping and annealing induced such compositional and electrical modification of Li4Ti5O 12, the polarization resistance of exchange reactions at the electrode/electrolyte interface decreased. Therefore, we have demonstrated that annealing in Ar-gas is capable of decreasing the resistance of exchange reactions at the electrode/electrolyte interface.
AB - The effects of atmospheric annealing on electrochemical performance for Nb2O5-doped Li4Ti5O12 anode materials have been investigated. The annealing of Nb2O 5-doped Li4Ti5O12 in Ar-gas suppressed the capacity fade, under the condition of a high charge-discharge rate, by virtue of an enhanced exchange reaction at the electrode/electrolyte interface. Under Ar-gas, Nb2O5-doped Li4Ti 5O12 was primarily reduced to increase the density of Ti3+ ions. This caused expansion of the Li4Ti 5O12 lattice, but had little impact on Li-ion diffusion into the lattice. When concurrent doping and annealing induced such compositional and electrical modification of Li4Ti5O 12, the polarization resistance of exchange reactions at the electrode/electrolyte interface decreased. Therefore, we have demonstrated that annealing in Ar-gas is capable of decreasing the resistance of exchange reactions at the electrode/electrolyte interface.
UR - http://www.scopus.com/inward/record.url?scp=84897432700&partnerID=8YFLogxK
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U2 - 10.1016/j.ceramint.2013.12.132
DO - 10.1016/j.ceramint.2013.12.132
M3 - Article
VL - 40
SP - 8869
EP - 8874
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 6
ER -