核壳纳米球钴基金属有机聚合物的制备及其储锂性能

以偏苯三甲酸和六水合硝酸钴为原料，通过水热法合成了2种反应时间不同的钴基金属有机聚合物（Co-MOP）。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和N₂吸附-脱附对Co-MOP材料进行了结构和形貌表征。将2种Co-MOP材料用作锂离子电池负极材料，并进行了电化学性能测试。结果表明，Co-MOP-12（水热反应12 h）展示出了优异的电化学性能，在100 mA·g^-1的电流密度下，Co-MOP-12电极的首圈可逆比容量达到979 mAh·g^-1，循环100圈后比容量高达1 345 mAh·g^-1。

Core-Shell Nanosphere Cobalt-Based Metal-Organic Polymer: Preparation and Lithium Storage Performance

Using trimellitic acid and cobalt nitrate hexahydrate as raw materials, two cobalt-based metal-organic polymers (Co-MOP) with different reaction times were synthesized by the hydrothermal method. The structure and morphology of Co-MOP were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and N₂ adsorption-desorption test. Two cobalt-based metal-organic polymer materials were used as anode materials for lithium-ion batteries, and the electrochemical performance tests were carried out. The results showed that Co-MOP-12 (hydrothermal reaction for 12 h) exhibited excellent electrochemical performance. The first-cycle reversible specific capacity the of Co-MOP-12 electrode reached 979 mAh·g^-1 at a current density of 100 mA·g^-1. The specific capacity was as high as 1 345 mAh·g^-1 after 100 cycles.