Copper nanofiber-networked cobalt oxide composites for high performance Li-ion batteries
<p>Abstract</p> <p>We prepared a composite electrode structure consisting of copper nanofiber-networked cobalt oxide (CuNFs@CoO<it> <sub>x</sub> </it>). The copper nanofibers (CuNFs) were fabricated on a substrate with formation of a network structure, which...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/292 |
| Summary: | <p>Abstract</p> <p>We prepared a composite electrode structure consisting of copper nanofiber-networked cobalt oxide (CuNFs@CoO<it> <sub>x</sub> </it>). The copper nanofibers (CuNFs) were fabricated on a substrate with formation of a network structure, which may have potential for improving electron percolation and retarding film deformation during the discharging/charging process over the electroactive cobalt oxide. Compared to bare CoO<it> <sub>x</sub> </it>thin-film (CoO<it> <sub>x</sub> </it>TF) electrodes, the CuNFs@CoO<it> <sub>x</sub> </it>electrodes exhibited a significant enhancement of rate performance by at least six-fold at an input current density of 3C-rate. Such enhanced Li-ion storage performance may be associated with modified electrode structure at the nanoscale, improved charge transfer, and facile stress relaxation from the embedded CuNF network. Consequently, the CuNFs@CoO<it> <sub>x</sub> </it>composite structure demonstrated here can be used as a promising high-performance electrode for Li-ion batteries.</p> |
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| ISSN: | 1931-7573 1556-276X |