Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications

Of all the challenges facing human beings in the near future, energy related issues are likely to be the grandest. To achieve a more sustainable society with adequate renewable energy and less environmental pollution, more versatile, robust and efficient approaches in electric energy storage and con...

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Main Authors: Nguyen, Son Truong, Nguyen, Hoa Tien, Rinaldi, Ali, Nguyen, Nam P. V., Fan, Zeng, Duong, Hai Minh
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/96140
http://hdl.handle.net/10220/10807
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-961402020-03-07T11:35:30Z Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications Nguyen, Son Truong Nguyen, Hoa Tien Rinaldi, Ali Nguyen, Nam P. V. Fan, Zeng Duong, Hai Minh School of Chemical and Biomedical Engineering Of all the challenges facing human beings in the near future, energy related issues are likely to be the grandest. To achieve a more sustainable society with adequate renewable energy and less environmental pollution, more versatile, robust and efficient approaches in electric energy storage and conversion are needed. To achieve these goals, the development of new electrode materials with high electrical conductivity, corrosion-resistance, high specific surface area, high porosity and low cost is highly desirable. Graphene aerogels (GAs) have been focused recently due to novel properties of graphene (extremely low electrical and thermal resistivity, large carrier mobility, high surface area and mechanical elasticity) and the low cost and easy preparation of graphene from graphite. The performance of GA-based electrodes strongly depends on the morphology and structure of the GAs. However, there has been little study on the optimization of the GA nanostructures in terms of surface area, pore size, pore volume and density for energy storage devices. In this work, the GA nanostructures synthesized from commercial graphite were controlled successfully. The graphene oxide (GO) was prepared from commercial graphite powder using a modified Hummers method. A hydrothermal method was used to synthesize GAs due to its simplicity, environmental friendliness and low cost. No binders were used to prevent their negative effects to the electrical conductivity of the aerogels. Effects of fabrication conditions and the GO concentration on the GA nanostructures were also quantified. A maximum Brunauer–Emmett–Teller (BET) surface area of 394 m2/g and the lightest density of 0.042 g/cm3 were achieved when the GA with 3 mg GO/mL was hydrothermally treated at 180 °C for 1.5 h. The thermal durability analysis showed that the GAs could be stable up to 500 °C in air, with 24 h of hydrothermal treatment time. Preliminarily the GA hydrothermally treated for 6 h had an electrical conductivity of 0.004 S/cm. The experimental results of the study are useful for optimizing GA structures for energy storage applications. 2013-06-27T06:25:04Z 2019-12-06T19:26:16Z 2013-06-27T06:25:04Z 2019-12-06T19:26:16Z 2012 2012 Journal Article Nguyen, S. T., Nguyen, H. T., Rinaldi, A., Nguyen, N. P. V., Fan, Z., & Duong, H. M. (2012). Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 414, 352-358. 0927-7757 https://hdl.handle.net/10356/96140 http://hdl.handle.net/10220/10807 10.1016/j.colsurfa.2012.08.048 en Colloids and surfaces A : physicochemical and engineering aspects © 2012 Elsevier B.V.
institution Nanyang Technological University
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description Of all the challenges facing human beings in the near future, energy related issues are likely to be the grandest. To achieve a more sustainable society with adequate renewable energy and less environmental pollution, more versatile, robust and efficient approaches in electric energy storage and conversion are needed. To achieve these goals, the development of new electrode materials with high electrical conductivity, corrosion-resistance, high specific surface area, high porosity and low cost is highly desirable. Graphene aerogels (GAs) have been focused recently due to novel properties of graphene (extremely low electrical and thermal resistivity, large carrier mobility, high surface area and mechanical elasticity) and the low cost and easy preparation of graphene from graphite. The performance of GA-based electrodes strongly depends on the morphology and structure of the GAs. However, there has been little study on the optimization of the GA nanostructures in terms of surface area, pore size, pore volume and density for energy storage devices. In this work, the GA nanostructures synthesized from commercial graphite were controlled successfully. The graphene oxide (GO) was prepared from commercial graphite powder using a modified Hummers method. A hydrothermal method was used to synthesize GAs due to its simplicity, environmental friendliness and low cost. No binders were used to prevent their negative effects to the electrical conductivity of the aerogels. Effects of fabrication conditions and the GO concentration on the GA nanostructures were also quantified. A maximum Brunauer–Emmett–Teller (BET) surface area of 394 m2/g and the lightest density of 0.042 g/cm3 were achieved when the GA with 3 mg GO/mL was hydrothermally treated at 180 °C for 1.5 h. The thermal durability analysis showed that the GAs could be stable up to 500 °C in air, with 24 h of hydrothermal treatment time. Preliminarily the GA hydrothermally treated for 6 h had an electrical conductivity of 0.004 S/cm. The experimental results of the study are useful for optimizing GA structures for energy storage applications.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Nguyen, Son Truong
Nguyen, Hoa Tien
Rinaldi, Ali
Nguyen, Nam P. V.
Fan, Zeng
Duong, Hai Minh
format Article
author Nguyen, Son Truong
Nguyen, Hoa Tien
Rinaldi, Ali
Nguyen, Nam P. V.
Fan, Zeng
Duong, Hai Minh
spellingShingle Nguyen, Son Truong
Nguyen, Hoa Tien
Rinaldi, Ali
Nguyen, Nam P. V.
Fan, Zeng
Duong, Hai Minh
Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
author_sort Nguyen, Son Truong
title Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
title_short Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
title_full Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
title_fullStr Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
title_full_unstemmed Morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
title_sort morphology control and thermal stability of binderless-graphene aerogels from graphite for energy storage applications
publishDate 2013
url https://hdl.handle.net/10356/96140
http://hdl.handle.net/10220/10807
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