Amine-functionalized graphene and its high discharge capacity for non-aqueous lithium–oxygen batteries

作者: Eunbeen Na , Jieun Kim , Minjae Kim , Seokhoon Jang , Mingyu Song

DOI: 10.1007/S42823-019-00052-W

关键词:

摘要: Amine-functionalized graphene was synthesized via a one-step solvothermal method and used as metal-free cathode for non-aqueous lithium–oxygen batteries. The material delivered an outstanding specific capacity of 19,789 mAh/g at current density 200 mA/g well better cycling stability than without the amine functional group. This improvement attributed to electron-donating effect groups appropriate mesopore volume, which can promote penetration oxygen, electrons, lithium ions, accommodate more discharge products, Li2O2 in Li–O2 has group on carbon surface, improves electrical conductivity provides electrochemical active sites oxygen absorption reactions.

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