Abstract
Three-dimensionally ordered macroporous (3DOM) Li 4Ti 5O 12 was synthesized using poly(methyl methacrylate) colloidal crystal templates and metal organic aqueous precursors. 3DOM structures of various filling fractions and wall thicknesses were synthesized, and the materials evaluated in lithium ion battery cells. The 3DOM architecture was found to markedly improve the rate capability of Li 4Ti 5O 12 when the voids of the template were underfilled or perfectly filled. When the template voids were overfilled, the performance of the electrode was similar to that of nonporous Li 4Ti 5O 12. We believe the enhanced rate capability results from the interconnected network of nanometer scale walls, which create short lithium diffusion distances and better contact with the electrolyte. SEM and TEM micrographs reveal that the nature of the wall structure forms low angle grain boundaries in 3DOM Li 4Ti 5O 12, which enhances conduction pathways in the particle, especially at high rates.
| Original language | English |
|---|---|
| Pages (from-to) | 482-489 |
| Number of pages | 8 |
| Journal | Chemistry of Materials |
| Volume | 18 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jan 24 2006 |
Fingerprint
ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
Cite this
Three-dimensionally ordered macroporous Li 4Ti 5O 12 : Effect of wall structure on electrochemical properties. / Sorensen, Erin M.; Barry, Scott J.; Jung, Ha Kyun; Rondinelli, James R.; Vaughey, John T.; Poeppelmeier, Kenneth R.
In: Chemistry of Materials, Vol. 18, No. 2, 24.01.2006, p. 482-489.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Three-dimensionally ordered macroporous Li 4Ti 5O 12
T2 - Effect of wall structure on electrochemical properties
AU - Sorensen, Erin M.
AU - Barry, Scott J.
AU - Jung, Ha Kyun
AU - Rondinelli, James R.
AU - Vaughey, John T.
AU - Poeppelmeier, Kenneth R
PY - 2006/1/24
Y1 - 2006/1/24
N2 - Three-dimensionally ordered macroporous (3DOM) Li 4Ti 5O 12 was synthesized using poly(methyl methacrylate) colloidal crystal templates and metal organic aqueous precursors. 3DOM structures of various filling fractions and wall thicknesses were synthesized, and the materials evaluated in lithium ion battery cells. The 3DOM architecture was found to markedly improve the rate capability of Li 4Ti 5O 12 when the voids of the template were underfilled or perfectly filled. When the template voids were overfilled, the performance of the electrode was similar to that of nonporous Li 4Ti 5O 12. We believe the enhanced rate capability results from the interconnected network of nanometer scale walls, which create short lithium diffusion distances and better contact with the electrolyte. SEM and TEM micrographs reveal that the nature of the wall structure forms low angle grain boundaries in 3DOM Li 4Ti 5O 12, which enhances conduction pathways in the particle, especially at high rates.
AB - Three-dimensionally ordered macroporous (3DOM) Li 4Ti 5O 12 was synthesized using poly(methyl methacrylate) colloidal crystal templates and metal organic aqueous precursors. 3DOM structures of various filling fractions and wall thicknesses were synthesized, and the materials evaluated in lithium ion battery cells. The 3DOM architecture was found to markedly improve the rate capability of Li 4Ti 5O 12 when the voids of the template were underfilled or perfectly filled. When the template voids were overfilled, the performance of the electrode was similar to that of nonporous Li 4Ti 5O 12. We believe the enhanced rate capability results from the interconnected network of nanometer scale walls, which create short lithium diffusion distances and better contact with the electrolyte. SEM and TEM micrographs reveal that the nature of the wall structure forms low angle grain boundaries in 3DOM Li 4Ti 5O 12, which enhances conduction pathways in the particle, especially at high rates.
UR - http://www.scopus.com/inward/record.url?scp=33644504489&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33644504489&partnerID=8YFLogxK
U2 - 10.1021/cm052203y
DO - 10.1021/cm052203y
M3 - Article
AN - SCOPUS:33644504489
VL - 18
SP - 482
EP - 489
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 2
ER -