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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Main Authors: Wang, Xu, Sumboja, Afriyanti, Khoo, Eugene, Yan, Chaoyi, Lee, Pooi See
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/98821
http://hdl.handle.net/10220/17119
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Institution: Nanyang Technological University
Language: English
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spelling 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
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry
spellingShingle 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
description 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.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Wang, Xu
Sumboja, Afriyanti
Khoo, Eugene
Yan, Chaoyi
Lee, Pooi See
format 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
url https://hdl.handle.net/10356/98821
http://hdl.handle.net/10220/17119
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