【摘要】 采用固相反应法制备了尘晶石型LiMn2O4及改性LiMn2O4。利用XRD和SEM对合成产物的结构进行表征,并测试了它们的电化学性能。结果表明:用LiCoO2改性后的复合产物保持了尖晶石主体结构,随着LiCoO2量的增加,Mn—O键增强,晶胞参数减小,产物的结构性能较好。以合成的改性产物为正极材料,MCMB为负极材料,组装的063048型锂离子电池循环300次后,容量保持率在80%以上。更多还原

【Abstract】 Spinel LiMn₂O₄ and modified LiMn₂O₄ were synthesized by the solid-state reaction method. The XRD and SEM were used to study the structure properties and the electrochemical performance of products. The results showed that the crystal structure of modified LiMn₂O₄ was kept as spinel, and with the increasing of LiCoO₂, bonds of Mn-O were strengthened and lattice parameters were decreased,the structure stability was improved.The 063048 Li-ion battery assembled with the synthesized （products） as the cathode materials and MCMB as the anode material showed that its capacity retention was over 80% after 300 cycles.更多还原