Synthesis and Characterisation of Reduced Graphene Oxide/Bismuth Composite for Electrodes in Electrochemical Energy Storage Devices

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• 作者：Jiabin Wang ; Dr. Han Zhang ; Dr. Michael R. C. Hunt ; Dr. Alasdair Charles ; Prof. Jie Tang ; Dr. Oana Bretcanu ; Dr. David Walker ; Khalil T. Hassan ; Yige Sun and Dr. Lidija Šiller
• 刊名：ChemSusChem
• 出版年：2017
• 出版时间：January 20, 2017
• 年：2017
• 卷：10
• 期：2
• 页码：363-371
• 全文大小：1804K
• ISSN：1864-564X

文摘

A reduced graphene oxide/bismuth (rGO/Bi) composite was synthesized for the first time using a polyol process at a low reaction temperature and with a short reaction time (60 °C and 3 hours, respectively). The as-prepared sample is structured with 20–50 nm diameter bismuth particles distributed on the rGO sheets. The rGO/Bi composite displays a combination of capacitive and battery-like charge storage, achieving a specific capacity value of 773 C g⁻¹ at a current density of 0.2 A g⁻¹ when charged to 1 V. The material not only has good power density but also shows moderate stability in cycling tests with current densities as high as 5 A g⁻¹. The relatively high abundance and low price of bismuth make this rGO/Bi material a promising candidate for use in electrode materials in future energy storage devices.