Porous graphene as cathode material for lithium ion capacitor with high electrochemical performance

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• 作者：Feiyue Tu ; Suqin Liu ; Tonghua Wu ; Guanhua Jin ; Chunyue Pan
• 关键词：Hydrothermal ; Graphene ; Lithium ion capacitors ; Porous
• 刊名：Powder Technology
• 出版年：February, 2014
• 年：2014
• 卷：253
• 期：Complete
• 页码：580-583
• 全文大小：690 K

文摘

The porous reduced graphene is prepared via an ethylene glycol assisted-hydrothermal method which is green, simple and nontoxic. The ethylene glycol assisted-hydrothermal reduced graphene (EG-RGO) delivers superior power density compared to those prepared without the assistant of ethylene glycol when used as cathode materials for the lithium ion capacitors. The EG-RGO electrode shows a high capacity of 172 mAh g^鈭?#xA0;1 at 0.1 A g^鈭?#xA0;1 and without capacity loss after 3000 cycles. Furthermore, the power density of the electrodes reaches 53.5 kW kg^鈭?#xA0;1 at the current density of 20 A g^鈭?#xA0;1 with an energy density of 240 Wh kg^鈭?#xA0;1. The high electrochemical performance of EG-RGO is attributed to the high electronic conductivity of the graphene.