Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage
In this contribution, we report a facile synthesis of ultrafine Co3O4 nanocrystals with an in situ construction of mesoporous and macroporous network for supercapacitor electrode material. The resultant ultrafine Co3O4 nanocrystals form an interconnected macroporous network with mesoporous hierarchi...
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sg-ntu-dr.10356-988212020-06-01T10:01:45Z Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage Wang, Xu Sumboja, Afriyanti Khoo, Eugene Yan, Chaoyi Lee, Pooi See School of Materials Science & Engineering DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry In this contribution, we report a facile synthesis of ultrafine Co3O4 nanocrystals with an in situ construction of mesoporous and macroporous network for supercapacitor electrode material. The resultant ultrafine Co3O4 nanocrystals form an interconnected macroporous network with mesoporous hierarchical structure. The unique architecture is realized through a modified sol–gel process to formulate highly porous cryogel using freeze-drying in the presence of a soft template. Small-angle X-ray scattering and transmission electron microscopy are used to investigate the organization of the Co3O4 porous structure. The unique channels in this hierarchical pores network provide intimate electrolyte contact with cobalt oxide and facilitate electrolyte diffusion. This hierarchical structure presents superior electrochemical performance with a specific capacitance of 742.3 F g–1 measured at a potential window of 0.5 V, unveiling one of the highest performance for sol–gel synthesized oxides to date, to the best of our knowledge. The capacity retention was 86.2% after 2000 cycles. The synthesis strategy highlights a versatile and facile dual template approach to independently tailor the porosity and particle sizes using a spontaneous nucleation approach. This serves as a major milestone toward high-performance porous metal oxide material for supercapacitor electrodes. 2013-10-31T04:07:57Z 2019-12-06T19:59:59Z 2013-10-31T04:07:57Z 2019-12-06T19:59:59Z 2012 2012 Journal Article Wang, X., Sumboja, A., Khoo, E., Yan, C., & Lee, P. S. (2012). Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage. The journal of physical chemistry C, 116(7), 4930-4935. https://hdl.handle.net/10356/98821 http://hdl.handle.net/10220/17119 10.1021/jp211339t en The journal of physical chemistry C |
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DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry Wang, Xu Sumboja, Afriyanti Khoo, Eugene Yan, Chaoyi Lee, Pooi See Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage |
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In this contribution, we report a facile synthesis of ultrafine Co3O4 nanocrystals with an in situ construction of mesoporous and macroporous network for supercapacitor electrode material. The resultant ultrafine Co3O4 nanocrystals form an interconnected macroporous network with mesoporous hierarchical structure. The unique architecture is realized through a modified sol–gel process to formulate highly porous cryogel using freeze-drying in the presence of a soft template. Small-angle X-ray scattering and transmission electron microscopy are used to investigate the organization of the Co3O4 porous structure. The unique channels in this hierarchical pores network provide intimate electrolyte contact with cobalt oxide and facilitate electrolyte diffusion. This hierarchical structure presents superior electrochemical performance with a specific capacitance of 742.3 F g–1 measured at a potential window of 0.5 V, unveiling one of the highest performance for sol–gel synthesized oxides to date, to the best of our knowledge. The capacity retention was 86.2% after 2000 cycles. The synthesis strategy highlights a versatile and facile dual template approach to independently tailor the porosity and particle sizes using a spontaneous nucleation approach. This serves as a major milestone toward high-performance porous metal oxide material for supercapacitor electrodes. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering Wang, Xu Sumboja, Afriyanti Khoo, Eugene Yan, Chaoyi Lee, Pooi See |
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Article |
author |
Wang, Xu Sumboja, Afriyanti Khoo, Eugene Yan, Chaoyi Lee, Pooi See |
author_sort |
Wang, Xu |
title |
Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage |
title_short |
Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage |
title_full |
Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage |
title_fullStr |
Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage |
title_full_unstemmed |
Cryogel synthesis of hierarchical interconnected macro-/mesoporous Co3O4 with superb electrochemical energy storage |
title_sort |
cryogel synthesis of hierarchical interconnected macro-/mesoporous co3o4 with superb electrochemical energy storage |
publishDate |
2013 |
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https://hdl.handle.net/10356/98821 http://hdl.handle.net/10220/17119 |
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