Electrospun Li 4Ti 5O 12/C composites for lithium-ion batteries with high rate performance
Two types of Li 4Ti 5O 12/C composites were synthesized through the electrospinning method. The first composite consists of Li 4Ti 5O 12 nanoparticles and aggregates coated by carbon and connected by carbon nanofibers. The second composite is constructed solely by Li 4Ti 5O 12/C fibers. These two co...
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Published in | Solid state ionics Vol. 204; pp. 61 - 65 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2011
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Subjects | |
Online Access | Get full text |
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Summary: | Two types of Li
4Ti
5O
12/C composites were synthesized through the electrospinning method. The first composite consists of Li
4Ti
5O
12 nanoparticles and aggregates coated by carbon and connected by carbon nanofibers. The second composite is constructed solely by Li
4Ti
5O
12/C fibers. These two composites are denoted as Li
4Ti
5O
12/C particles/fibers and Li
4Ti
5O
12/C fibers, respectively. It is found that both composites show higher reversible capacities and better rate performance than commercial Li
4Ti
5O
12 nanoparticles. Comparing the two electrospun composites, Li
4Ti
5O
12/C fibers exhibit higher reversible capacity, greater rate capacity, and smaller electrode polarization, indicating that Li
4Ti
5O
12/C fibers have better kinetics than Li
4Ti
5O
12/C particles/fibers due to the elimination of Li
4Ti
5O
12 aggregates and the formation of carbon-based fiber structure.
► Li
4Ti
5O
12/C particles/fibers and Li
4Ti
5O
12/C fibers were synthesized by electrospinning. ► In Li
4Ti
5O
12/C particles/fibers, Li
4Ti
5O
12 particles are coated by carbon and connected by carbon nanofibers. ► Li
4Ti
5O
12/C fibers eliminate the formation of Li
4Ti
5O
12 aggregates and provide short pathways for both lithium ions and electrons. |
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ISSN: | 0167-2738 1872-7689 |
DOI: | 10.1016/j.ssi.2011.10.019 |