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Effect of particle dispersion on high rate performance of nano-sized Li4Ti5O12 anode
- Source :
-
Electrochimica Acta . Jul2007, Vol. 52 Issue 23, p6470-6475. 6p. - Publication Year :
- 2007
-
Abstract
- Abstract: Nano-sized Li4Ti5O12 powders with high dispersivity were fabricated by a sol–gel process using P123 as surfactant, which exhibited much better high rate performance towards Li+ insertion/extraction as compared to the densely aggregated Li4Ti5O12 particles although the primary grain sizes of both samples were almost the same. The Li4Ti5O12 electrode prepared from the well-dispersed nanopowders can preserve 88.6% of the capacity at 0.1Ag−1 when being cycled at 1Ag−1, which is obviously higher than that of the densely aggregated sample, in which only 30% capacity can be retained. By improving the dispersivity, the specific surface area of the Li4Ti5O12 nanoparticles, hence the electrode–electrolyte contact area was increased; meanwhile, more homogeneous mixing of the active materials with carbon black was achieved. All these factors might have resulted in the better high rate performance. [Copyright &y& Elsevier]
- Subjects :
- *NANOCRYSTALS
*DISPERSION (Chemistry)
*SURFACE active agents
*ELECTROLYTES
Subjects
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 52
- Issue :
- 23
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 25321320
- Full Text :
- https://doi.org/10.1016/j.electacta.2007.04.070