Abstract Graphene quantum dots and biomass activated carbon have enormous potential for electrochemical application, which composites as anode materials for lithium ion battery are rarely reported. Here, the rice husk based activated carbon was modified by graphene quantum dots, exhibiting excellent electrochemical performance as an electrode for lithium ion battery. The results show that, with the introduction of graphene quantum dots, the charge transfer resistance of the electrode was reduced from 577.7 Ω to 123.9 Ω, and the lithium ion diffusion coefficient was increased by 175 times. Meanwhile, the introduction of graphene quantum dots plays an important role in improving the cycle stability of the battery.

中文翻译：

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石墨烯量子点/生物质活性炭电极的制备及电化学性能

摘要 石墨烯量子点和生物质活性炭具有巨大的电化学应用潜力，其复合材料作为锂离子电池负极材料的报道很少。在这里，稻壳基活性炭被石墨烯量子点改性，作为锂离子电池的电极表现出优异的电化学性能。结果表明，随着石墨烯量子点的引入，电极的电荷转移电阻从577.7Ω降低到123.9Ω，锂离子扩散系数提高了175倍。同时，石墨烯量子点的引入对提高电池的循环稳定性具有重要作用。