Abstract Nanosized particles of cobalt ferrite CoFe2O4 incorporated into multi-walled carbon nanotubes (CNT) have been studied as anode material for Li-ion batteries. In order to evaluate the benefits of CNT shells, the results are compared to bare CoFe2O4 nanoparticles. Electrochemical measurements by means of cyclic voltammetry and galvanostatic cycling show typical redox activity associated with the ferrite conversion reaction which implies that the filled nanomaterial is electrochemically active. Galvanostatic cycling measurements reveal better cycling stability of the CNT-incorporated compared to the bare ferrite nanoparticles. The data imply that embedding nanoparticles inside the protective and conductive shells of CNTs opens a way to utilize high theoretical capacities of CoFe2O4 for electrochemical energy storage.

中文翻译：

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CoFe2O4填充碳纳米管作为锂离子电池负极材料

摘要 纳米尺寸的钴铁氧体 CoFe2O4 颗粒并入多壁碳纳米管 (CNT) 已被研究作为锂离子电池的负极材料。为了评估 CNT 壳的好处，将结果与裸 CoFe2O4 纳米颗粒进行比较。通过循环伏安法和恒电流循环进行的电化学测量显示出与铁氧体转化反应相关的典型氧化还原活性，这意味着填充的纳米材料具有电化学活性。恒电流循环测量表明，与裸铁氧体纳米粒子相比，掺入 CNT 的循环稳定性更好。数据表明，将纳米粒子嵌入 CNT 的保护性和导电壳内开辟了一种利用 CoFe2O4 的高理论容量进行电化学储能的方法。