【摘要】 Fe₃O₄/CNTs纳米复合材料用水热法在乙醇和丙二醇的混合溶液中合成，尺寸为5～15 nm的四氧化三铁纳米颗粒均匀附着在碳纳米管表面。作为锂电池负极材料，合成的Fe₃O₄/CNTs纳米复合材料展现出了优异的长循环特性和倍率循环特性。在电流密度100 mA g^-1的条件下，在300次循环充放电后容量仍然能够保持在605 mAh g^-1。酸处理碳纳米管的加入为四氧化三铁提供了大量的生长点，显著减小了四氧化三铁颗粒的尺寸，阻止了充放电过程中颗粒的团聚，构建了独特的三维导电网，使复合材料展现出了优异的电化学性能。更多还原

【Abstract】 In this work, Fe₃O₄/CNTs nanocomposite with well-distributed Fe₃O₄ nanoparticles of 5～15nm has been fabricated by a facile hydrothermal procedure in a mixture of ethanol and propylene glycol. When taken as anode materials in lithium ion batteries, the Fe₃O₄/CNTs nanocomposite has demonstrated excellent cycle performance with a specific capacity of 605 mAh g^-1 even after 300 cycles at the current density of 100mA g^-1. The addition of acid-treated CNTs can decrease the size of Fe₃O₄ nanoparticles in the nanocomposite immensely due to the high specific surface area. The excellent electrochemical performances of the Fe₃O₄/CNTs nanocomposite were attributed to the microstructure characteristics as well as the remarkable electrical properties of CNTs and high capacity of the downsized Fe₃O₄ nanoparticles.更多还原