【摘要】 研究了不同烧结温度及恒温保持时间对富锂锰基正极材料Li_1+x[Ni_0.35Mn_0.65]O_2+y形貌、结构及电化学性能的影响。XRD及SEM研究结果表明:所合成的Li_1+x[Ni_0.35Mn_0.65]O_2+y正极材料为层状α-NaFeO₂结构,类球形,单颗粒大小均匀。扣式电池测试结果表明:当电流密度为12.5 m A/g,测试电压在2.0⁴.8 V时,Li_1+x[Ni_0.35Mn_0.65]O_2+y材料最高初始放电比容量为213.3 m A·h/g,首次放电效率为71.0%。扣电进行EIS测试,结果表明材料具有较小的电荷转移阻抗。更多还原

【Abstract】 Effects on the morphology,structure and electrochemical properties of the rich lithium manganese anode material Li_1+x[Ni_0.35Mn_0.65]O_2+y by different sintering temperature and holding time on were studied in this paper. X-ray diffraction（XRD） and Scanning electron microscopy（SEM） results showed that Li_1+x[Ni_0.35Mn_0.65]O_2+y were homogeneous spherical particles and obtain the layer structure of α-Na Fe O2;The electrochemical performance of coin cell was tested. The discharge capacity was up to 213.3m Ah/g and the first efficiency is 71.0% under a 12.5 Ah/g between 2.0⁴.8 V. EIS result showed that the material had lower charge transfer resistance.更多还原