Achieving high rate performance in layered hydroxide supercapacitor electrodes
Layered hydroxides (LHs) are promising supercapacitor electrode materials with high specific capacitances. However, they generally exhibit poor energy storage ability at high current densities due to their insulating nature. Nickel-cobalt-aluminum LHs are synthesized and chemically treated to form L...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/102038 http://hdl.handle.net/10220/18898 |
| _version_ | 1826128682768400384 |
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| author | Wang, Xu Yan, Chaoyi Sumboja, Afriyanti Yan, Jian Lee, Pooi See |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Wang, Xu Yan, Chaoyi Sumboja, Afriyanti Yan, Jian Lee, Pooi See |
| author_sort | Wang, Xu |
| collection | NTU |
| description | Layered hydroxides (LHs) are promising supercapacitor electrode materials with high specific capacitances. However, they generally exhibit poor energy storage ability at high current densities due to their insulating nature. Nickel-cobalt-aluminum LHs are synthesized and chemically treated to form LHs with enhanced conductivity that results in greatly enhanced rate performances. The key role of chemical treatment is to enable the partial conversion of Co2+ to a more conductive Co3+ state that stimulates charge transfers. Simultaneously, the defects on the LHs caused by the selective etching of Al promoted the electrolyte diffusion within LHs. As a result, the LHs show a high specific capacitance of 738 F g−1 at 30 A g−1, which is 57.2% of 1289 F g−1 at 1 A g−1. The strategy provides a facile and effective method to achieve high performance LHs for supercapacitor electrode materials. |
| first_indexed | 2024-10-01T07:28:57Z |
| format | Journal Article |
| id | ntu-10356/102038 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:28:57Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1020382020-06-01T10:01:31Z Achieving high rate performance in layered hydroxide supercapacitor electrodes Wang, Xu Yan, Chaoyi Sumboja, Afriyanti Yan, Jian Lee, Pooi See School of Materials Science & Engineering DRNTU::Engineering::Materials::Energy materials Layered hydroxides (LHs) are promising supercapacitor electrode materials with high specific capacitances. However, they generally exhibit poor energy storage ability at high current densities due to their insulating nature. Nickel-cobalt-aluminum LHs are synthesized and chemically treated to form LHs with enhanced conductivity that results in greatly enhanced rate performances. The key role of chemical treatment is to enable the partial conversion of Co2+ to a more conductive Co3+ state that stimulates charge transfers. Simultaneously, the defects on the LHs caused by the selective etching of Al promoted the electrolyte diffusion within LHs. As a result, the LHs show a high specific capacitance of 738 F g−1 at 30 A g−1, which is 57.2% of 1289 F g−1 at 1 A g−1. The strategy provides a facile and effective method to achieve high performance LHs for supercapacitor electrode materials. 2014-03-14T03:22:27Z 2019-12-06T20:48:36Z 2014-03-14T03:22:27Z 2019-12-06T20:48:36Z 2013 2013 Journal Article Wang, X., Yan, C., Sumboja, A., Yan, J., & Lee, P. S. (2013). Achieving High Rate Performance in Layered Hydroxide Supercapacitor Electrodes. Advanced Energy Materials, in press. 1614-6832 https://hdl.handle.net/10356/102038 http://hdl.handle.net/10220/18898 10.1002/aenm.201301240 en Advanced energy materials |
| spellingShingle | DRNTU::Engineering::Materials::Energy materials Wang, Xu Yan, Chaoyi Sumboja, Afriyanti Yan, Jian Lee, Pooi See Achieving high rate performance in layered hydroxide supercapacitor electrodes |
| title | Achieving high rate performance in layered hydroxide supercapacitor electrodes |
| title_full | Achieving high rate performance in layered hydroxide supercapacitor electrodes |
| title_fullStr | Achieving high rate performance in layered hydroxide supercapacitor electrodes |
| title_full_unstemmed | Achieving high rate performance in layered hydroxide supercapacitor electrodes |
| title_short | Achieving high rate performance in layered hydroxide supercapacitor electrodes |
| title_sort | achieving high rate performance in layered hydroxide supercapacitor electrodes |
| topic | DRNTU::Engineering::Materials::Energy materials |
| url | https://hdl.handle.net/10356/102038 http://hdl.handle.net/10220/18898 |
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