CoMn_2O_4新型锂离子电池负极材料的合成与性能研究

Synthesis and Properties of Novel CoMn_2O_4 Spheres for Lithium-Ion Batteries Anodes

以Co(Ac)2·4H2O和Mn(Ac)2·4H2O为原料,乙二醇为溶剂,采用简单的一步水热法成功地合成了CoMn2O4微球。使用X射线衍射(XRD)和透射电子显微镜(TEM)对合成的产物进行物相和形貌分析。采用蓝电测试系统对产物进行电化学性能测试,结果表明,当CoMn2O4微球用作锂离子电池负极材料时,在电流密度为100mA·g-1的条件下,其首次放电容量为1056mAh·g-1,50次充放电循环后容量仍保持在611.7mAh·g-1左右并趋于稳定,呈现出良好的循环性能。

CoMn2O4 microspheres were fabricated by one-step hydrothermal route using Co（Ac）2 · 4H2O and Mn（Ac）2 · 4H2O. The crystalline phase and the morphology were characterized by X-ray diffraction（XRD） and transmission electron microscopy （TEM）. The electrochemical properties of the composites were evaluated by the LAND testing system. When the composites were tested as a negative material for lithium ion batteries, the results displayed that the CoMn2O4 samples exhibited a first discharge capacity as 1056 mAh/g at a high current density of 100mA/g, and it remained at 611.7mAh/g after 50 cycles and tended to be stable. Therefore, it was confirmed that the as-resultant products displayed excellent cycling performances.