Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries
A novel Co3O4 nanoparticles (NPs)/exfoliated graphite (EG) composite has been prepared through a stirring-assistant hydrothermal route and a subsequent post-anneal treatment. Results of microstructure characterizations of XRD, FE-SEM and HR-TEM analyses indicate that high-crystallized Co3O4-NPs with...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Pergamon
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/30766 |
| _version_ | 1848753183539593216 |
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| author | Zhao, Y. Li, Y. Ma, C. Shao, Zongping |
| author_facet | Zhao, Y. Li, Y. Ma, C. Shao, Zongping |
| author_sort | Zhao, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A novel Co3O4 nanoparticles (NPs)/exfoliated graphite (EG) composite has been prepared through a stirring-assistant hydrothermal route and a subsequent post-anneal treatment. Results of microstructure characterizations of XRD, FE-SEM and HR-TEM analyses indicate that high-crystallized Co3O4-NPs with a dimension of ~5 nm are homogenously anchored on the nanosheets of EG in the form of tiny agglomerates of ~20 nm. Restack and shrinkage of the edge regions of EG are distinctly observed after suffering from the hydrothermal process, which exerts a positive influence over the decay-free cycling ability of the Co3O4-NPs/EG electrode. The reversible capacity increases with cycling, and reaches 1183 mAhg-1 (94th cycle) at 100 mAg-1 and 739 mAhg-1 (100th cycle) at 1000 mAg-1. After suffering from 800 cycles at 2000 mAg-1 and resetting to 100 mAg-1, the charge capacity recovers to as high as 1225 mAhg-1 immediately, and stabilizes in the following cycles. The decay-free cycling performances and good rate capability are ascribed to the favorable synergistic effect between Co3O4-NPs and the robust/conductive skeleton of EG. In addition, an exceeded capacity which much surpasses the calculated theoretical value is achieved, further proving the good synergistic enhancement due to the high-effective integration between Co3O4-NPs and EG. |
| first_indexed | 2025-11-14T08:20:28Z |
| format | Journal Article |
| id | curtin-20.500.11937-30766 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:20:28Z |
| publishDate | 2016 |
| publisher | Pergamon |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-307662017-09-13T15:08:24Z Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries Zhao, Y. Li, Y. Ma, C. Shao, Zongping A novel Co3O4 nanoparticles (NPs)/exfoliated graphite (EG) composite has been prepared through a stirring-assistant hydrothermal route and a subsequent post-anneal treatment. Results of microstructure characterizations of XRD, FE-SEM and HR-TEM analyses indicate that high-crystallized Co3O4-NPs with a dimension of ~5 nm are homogenously anchored on the nanosheets of EG in the form of tiny agglomerates of ~20 nm. Restack and shrinkage of the edge regions of EG are distinctly observed after suffering from the hydrothermal process, which exerts a positive influence over the decay-free cycling ability of the Co3O4-NPs/EG electrode. The reversible capacity increases with cycling, and reaches 1183 mAhg-1 (94th cycle) at 100 mAg-1 and 739 mAhg-1 (100th cycle) at 1000 mAg-1. After suffering from 800 cycles at 2000 mAg-1 and resetting to 100 mAg-1, the charge capacity recovers to as high as 1225 mAhg-1 immediately, and stabilizes in the following cycles. The decay-free cycling performances and good rate capability are ascribed to the favorable synergistic effect between Co3O4-NPs and the robust/conductive skeleton of EG. In addition, an exceeded capacity which much surpasses the calculated theoretical value is achieved, further proving the good synergistic enhancement due to the high-effective integration between Co3O4-NPs and EG. 2016 Journal Article http://hdl.handle.net/20.500.11937/30766 10.1016/j.electacta.2016.07.102 Pergamon restricted |
| spellingShingle | Zhao, Y. Li, Y. Ma, C. Shao, Zongping Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries |
| title | Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries |
| title_full | Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries |
| title_fullStr | Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries |
| title_full_unstemmed | Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries |
| title_short | Micro-/nano-structured hybrid of exfoliated graphite and Co3O4 nanoparticles as high-performance anode material for Li-ion batteries |
| title_sort | micro-/nano-structured hybrid of exfoliated graphite and co3o4 nanoparticles as high-performance anode material for li-ion batteries |
| url | http://hdl.handle.net/20.500.11937/30766 |