Microwave plasma-induced graphene-sheet fibers from waste coffee grounds

Zhipeng Wang; Hironori Ogata; Shingo Morimoto; Masatsugu Fujishige; Kenji Takeuchi; Hiroyuki Muramatsu; Takuya Hayashi; Josue Ortiz-Medina; Mohd Zamri Mohd Yusop; Masaki Tanemura; Mauricio Terrones; Yoshio Hashimoto; Morinobu Endo

doi:10.1039/C5TA03833B

Microwave plasma-induced graphene-sheet fibers from waste coffee grounds†

Zhipeng Wang,*^ab Hironori Ogata,^cd Shingo Morimoto,^a Masatsugu Fujishige,^a Kenji Takeuchi,^a Hiroyuki Muramatsu,^b Takuya Hayashi,^b Josue Ortiz-Medina,^a Mohd Zamri Mohd Yusop,^ef Masaki Tanemura,^e Mauricio Terrones,^g Yoshio Hashimoto^ab and Morinobu Endo^a

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* Corresponding authors

^a Institute of Carbon Science and Technology, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
E-mail: zp_wang@shinshu-u.ac.jp
Tel: +81-26-2695670

^b Department of Electrical and Electronic Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan

^c Department of Chemical Science and Technology, Faculty of Bioscience and Applied Chemical, Graduate School of Engineering, Hosei University, 3-7-2, Kajino-cho, Koganei, Tokyo 184-8584, Japan

^d Research Center for Micro-Nano Technology, Hosei University, 3-11-15, Midori-cho, Koganei, Tokyo 184-0003, Japan

^e Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

^f Department of Materials, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

^g Department of Physics, Department of Materials Science and Engineering, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA

Abstract

Graphene-sheet fiber, a novel structure of graphitic carbon, grew from coffee grounds under the condition of microwave plasma irradiation. The resulting fiber consisted of only few-layer graphene without a hollow structure inside while possessing a large amount of graphene edges and high conductivity. Due to these advantages, graphene-sheet fibers may find applications in electrochemical energy conversion and storage.

Journal of Materials Chemistry A

Microwave plasma-induced graphene-sheet fibers from waste coffee grounds†

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