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Molecules
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Preparation and Application of Graphene and Its Composites
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Preparation and Application of Graphene and Its Composites

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Applied Chemistry".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 7193

Special Issue Editors

Prof. Dr. Xinli Guo

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China
Interests: nano carbon materials; thin films; nanomaterials science and technology; molecular luminescence
Prof. Dr. Yao Zhang

E-Mail Website
Guest Editor
Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Interests: lithium-ion batteries; nano-composite; hydrogen storage materials; solid electrolyte material; silicon carbon anode material
Dr. Xuhai Zhang

E-Mail Website
Guest Editor
Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Interests: nano-composite functional film; super-hard coating; high-temperature film; preparation and performance research; material analysis; high-performance metal materials

Special Issue Information

Dear Colleagues,

Graphene and graphene-based composite are attracting increasing interest due to their superior physic chemical, mechanical, and functional features. Such materials have been proposed for several applications in different research fields, from chemistry and engineering to electronics, materials science, energy, and catalysis.

This Special Issue is intended as a platform for interactive material science articles (either research and review articles) with an emphasis on the preparation, characterization, all aspects of physical properties, and application of graphene and its composites. The ultimate aim is to collect all the recent advances in the field, highlighting the strengths and the weaknesses of each nanostructure and providing new ideas for researchers working in this multidisciplinary area.

Prof. Dr. Xinli Guo
Prof. Yao Zhang
Dr. Xuhai Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • grapheme
  • graphene composite
  • preparation
  • application
  • energy
  • photocatalysis
  • electronic engineering

Published Papers (3 papers)

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Research

9 pages, 2547 KiB  
Article
Ultralight, Ultraflexible, Anisotropic, Highly Thermally Conductive Graphene Aerogel Films
by Zheng Liu, Qinsheng Wang, Linlin Hou, Yingjun Liu and Zheng Li
Molecules 2021, 26(22), 6867; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26226867 - 14 Nov 2021
Cited by 7 | Viewed by 1962
Abstract
Graphene aerogels have attracted much attention as a promising material for various applications. The unusually high intrinsic thermal conductivity of individual graphene sheets makes an obvious contrast with the thermal insulating performance of assembled 3D graphene materials. We report the preparation of anisotropy [...] Read more.
Graphene aerogels have attracted much attention as a promising material for various applications. The unusually high intrinsic thermal conductivity of individual graphene sheets makes an obvious contrast with the thermal insulating performance of assembled 3D graphene materials. We report the preparation of anisotropy 3D graphene aerogel films (GAFs) made from tightly packed graphene films using a thermal expansion method. GAFs with different thicknesses and an ultimate low density of 4.19 mg cm−3 were obtained. GAFs show high anisotropy on average cross-plane thermal conductivity (K⊥) and average in-plane thermal conductivity (K||). Additionally, uniaxially compressed GAFs performed a large elongation of 11.76% due to the Z-shape folding of graphene layers. Our results reveal the ultralight, ultraflexible, highly thermally conductive, anisotropy GAFs, as well as the fundamental evolution of macroscopic assembled graphene materials at elevated temperature. Full article
(This article belongs to the Special Issue Preparation and Application of Graphene and Its Composites)
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9 pages, 2184 KiB  
Article
Ultrafast Growth of Large Area Graphene on Si Wafer by a Single Pulse Current
by Yifei Ge, Mingming Lu, Jiahao Wang, Jianxun Xu and Yuliang Zhao
Molecules 2021, 26(16), 4940; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26164940 - 15 Aug 2021
Cited by 4 | Viewed by 1844
Abstract
Graphene has many excellent optical, electrical and mechanical properties due to its unique two-dimensional structure. High-efficiency preparation of large area graphene film is the key to achieve its industrial applications. In this paper, an ultrafast quenching method was firstly carried out to flow [...] Read more.
Graphene has many excellent optical, electrical and mechanical properties due to its unique two-dimensional structure. High-efficiency preparation of large area graphene film is the key to achieve its industrial applications. In this paper, an ultrafast quenching method was firstly carried out to flow a single pulse current through the surface of a Si wafer with a size of 10 mm × 10 mm for growing fully covered graphene film. The wafer surface was firstly coated with a 5-nm-thick carbon layer and then a 25-nm-thick nickel layer by magnetron sputtering. The optimum quenching conditions are a pulse current of 10 A and a pulse width of 2 s. The thus-prepared few-layered graphene film was proved to cover the substrate fully, showing a high conductivity. Our method is simple and highly efficient and does not need any high-power equipment. It is not limited by the size of the heating facility due to its self-heating feature, providing the potential to scale up the size of the substrates easily. Furthermore, this method can be applied to a variety of dielectric substrates, such as glass and quartz. Full article
(This article belongs to the Special Issue Preparation and Application of Graphene and Its Composites)
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Graphical abstract

12 pages, 28971 KiB  
Article
Facile Synthesis of Sponge-Like Porous Nano Carbon-Coated Silicon Anode with Tunable Pore Structure for High-Stability Lithium-Ion Batteries
by Shugui Song, Jingcang Li, Anqi Zheng, Yongqiang Yang and Kuibo Yin
Molecules 2021, 26(11), 3211; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26113211 - 27 May 2021
Cited by 1 | Viewed by 2625
Abstract
To address the challenge of the huge volume expansion of silicon anode, carbon-coated silicon has been developed as an effective design strategy due to the improved conductivity and stable electrochemical interface. However, although carbon-coated silicon anodes exhibit improved cycling stability, the complex synthesis [...] Read more.
To address the challenge of the huge volume expansion of silicon anode, carbon-coated silicon has been developed as an effective design strategy due to the improved conductivity and stable electrochemical interface. However, although carbon-coated silicon anodes exhibit improved cycling stability, the complex synthesis methods and uncontrollable structure adjustment still make the carbon-coated silicon anodes hard to popularize in practical application. Herein, we propose a facile method to fabricate sponge-like porous nano carbon-coated silicon (sCCSi) with a tunable pore structure. Through the strategy of adding water into precursor solution combined with a slow heating rate of pre-oxidation, a sponge-like porous structure can be formed. Furthermore, the porous structure can be controlled through stirring temperature and oscillation methods. Owing to the inherent material properties and the sponge-like porous structure, sCCSi shows high conductivity, high specific surface area, and stable chemical bonding. As a result, the sCCSi with normal and excessive silicon-to-carbon ratios all exhibit excellent cycling stability, with 70.6% and 70.2% capacity retentions after 300 cycles at 500 mA g−1, respectively. Furthermore, the enhanced buffering effect on pressure between silicon nanoparticles and carbon material due to the sponge-like porous structure in sCCSi is further revealed through mechanical simulation. Considering the facile synthesis method, flexible regulation of porous structure, and high cycling stability, the design of the sCCSi paves a way for the synthesis of high-stability carbon-coated silicon anodes. Full article
(This article belongs to the Special Issue Preparation and Application of Graphene and Its Composites)
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