【摘要】 重点研究了室温固相法Co/Mn氢氧化物包覆Ni(OH)2的机理。采用XRD,SEM,TEM和EDS分析检测手段分析了未包覆与表面包覆材料的结构、形貌和表面成分。TEM实验结果表明,LiNiO2颗粒表面包覆了一薄层化合物;XPS实验结果表明,LiNiO2颗粒表面包覆了Co/Mn元素;SEM和EDS实验结果进一步表明,球形LiNiO2颗粒表面均匀包覆了Co/Mn化合物层。电化学性能测试结果表明,经Co/Mn包覆的LiNiO2正极材料显示了优越的循环性能。更多还原

【Abstract】 Preparation of Co/Mn-coated LiNiO2 cathode materials by solid-state reaction at room temperature was described. The mechanism of Co/Mn hydrate coated Ni(OH)2 by solid-state reaction at room temperature was investigated.The structure, morphology and surface composition of the uncoated and coated particles were studied with XRD,SEM,TEM and EDS.The TEM result shows a thin film is coated on the surface of LiNiO2 particles.XPS results show Co/Mn elements are coated on the surface of LiNiO2 particles.SEM and EDS results indicate that the coating of Co/Mn layer uniformly covers the surface of spherical LiNiO2 particles.The electrochemical performances results show LiNiO2 cathode materials have a good cycleability by the Co/Mn coating.更多还原