| 引用本文: | 肖鹏,孙磊,郭东亮,尹康涌,揭建胜.高质量石墨烯片的膨胀剥离法制备及测试[J].材料科学与工艺,2025,33(1):1-7.DOI:10.11951/j.issn.1005-0299.20230187. |
| XIAO Peng,SUN Lei,GUO Dongliang,YIN Kangyong,JIE Jiansheng.Preparation and test of high-quality graphene sheets through expansion-exfoliation method[J].Materials Science and Technology,2025,33(1):1-7.DOI:10.11951/j.issn.1005-0299.20230187. |
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| 摘要: |
| 石墨烯具有诸多优异的理化性能,其功能产品正逐步从理论研究走向产业应用,但如何高质量、低成本的批量化制备仍是限制石墨烯产品规模化推广的关键。本文提出了一种基于膨胀剥离过程的石墨烯制备方法,该方法先将天然石墨在常温常压下自行膨胀以减弱层间范德华力,再对膨胀后的石墨进行液相剥离即得到石墨烯片。与已有报道相比,该方法省去了石墨膨胀需要高温加热或微波辐照这一必要条件,且对不同规格天然石墨均适用,具有显著的成本优势。采用场发射扫描电子显微镜、透射电子显微镜、原子力显微镜、X射线光电子能谱仪、Raman光谱仪对石墨烯的形貌、成分和晶体质量进行了表征分析,制备的石墨烯片60%以上厚度在5层以下,具有较高晶体质量,不含硫,含氧量极低。再将石墨烯片通过旋转涂覆制成透明导电膜,测得85.2%透光度条件下方块电阻低至118 Ω/sq,进一步证实该方法能够高质量、低成本制备石墨烯。 |
| 关键词: 石墨烯 天然石墨 膨胀石墨 液相剥离 透明导电膜 |
| DOI：10.11951/j.issn.1005-0299.20230187 |
| 分类号:TM242 |
| 文献标识码:A |
| 基金项目:江苏省自然科学基金面上项目资助(BK20211029). |
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| Preparation and test of high-quality graphene sheets through expansion-exfoliation method |
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XIAO Peng1,2, SUN Lei1, GUO Dongliang1, YIN Kangyong1, JIE Jiansheng2
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(1. State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China; 2. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215213, China)
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| Abstract: |
| Graphene has many excellent physical and chemical properties, and its related functional products are gradually transitioning from theoretical research to industrial application. However, achieving high-quality, low-cost and large-scale production remains a key challenge for widespread adoption of graphene products. Herein, a graphene preparation method based on expansion-exfoliation process is proposed. In this method, natural graphite conducted self-expansion at room temperature and pressure to weaken the van der Waals forces between layers, and then the expanded graphite is exfoliated in liquid phase to obtain graphene sheets. Compared to existing reports, this method eliminates the necessary conditions of high-temperature heating or microwave irradiation for graphite expansion. In addition, it is applicable to different specifications of natural graphite, which provides significant cost advantages. The morphology, composition and crystal quality of graphene were characterized and analyzed by field emission scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy and Raman spectrometer. It was found that more than 60% of the graphene sheets prepared by this method have a thickness of less than 5 layers, exhibiting high crystal quality, sulfur-free and extremely low oxygen content. Furthermore, the graphene sheet was then coated with a transparent conductive film, and the square resistance was as low as 118 Ω/sq under 85.2% transmittance, confirming that the method can produce graphene with high quality at low cost. |
| Key words: graphene natural graphite expanded graphite liquid exfoliation transparent conductive film |
