Abstract

Magnetic CoFe₂O₄@carbon (CFO@C) nanoparticles were synthesized by employing glucose as carbon source via hydrothermal process, and their magnetic and electrochemical properties of CFO@C are both studied in this work. The M_s and M_r values of CFO@C nanoparticles are lower than those of pure CFO samples. The changed magnetic properties may be related to the carbon layer extinguishing the surface magnetic moment with spin canting. Benefiting from the amorphous structure and good electronic conductivity of carbon shells, the CFO@C 20 wt % electrode exhibited the capacity of 201 mA h g^–1 at the current density of 500 mA g^–1 and high reversible capacity up to 353 mA h g^–1 after 100 cycles at the current density of 50 mA g^–1, respectively.

中文翻译：

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简易水热法合成CoFe 2 O 4纳米晶体的磁和电化学性质研究

摘要

以葡萄糖为碳源，通过水热法合成了磁性CoFe ₂ O ₄碳纳米粒子，并研究了它们的磁性和电化学性质。CFO @ C纳米颗粒的M _s和M _r值低于纯CFO样品的M _s和M _r值。改变的磁性能可能与碳层通过自旋倾斜消除表面磁矩有关。得益于碳壳的非晶态结构和良好的电子导电性，CFO @ C 20 wt％电极在500 mA g ^–1的电流密度下显示出201 mA hg ^–1的容量电流密度为50 mA g ^–1时，经过100个循环后，可逆容量高达353 mA hg ^–1。