【摘要】 采用模板导向法和高温固相法制备尖晶石型八面体结构的Li Mn₂O₄锂离子电池正极材料,研究了该材料的结构和电化学性能。电化学性能研究表明,该电极材料具有良好的循环稳定性和倍率性能,在2.5⁴.5 V电压范围,电流密度为100 m A/g时,首周充放电比容量分别为147和179 m A·h/g,循环50周后,其充放电比容量仍分别保持在180/181 m A·h/g。优良的电化学性能可能归因于尖晶石Li Mn₂O₄的形貌结构特征,该方法为制备锂离子电池正极材料提供了思路和依据。更多还原

【Abstract】 Spinel Li Mn₂O₄ octahedral nanoparticles were prepared by template-directed and high temperature solid-phase methods as cathode materials for lithium-ion batteries.Their structure and electrochemical performances were investigated.The electrochemical performance results show that Li Mn₂O₄ as lithium-ion batteries cathode displays excellent cycling stability,rate capability and high specific capacity.The initial charge-discharge specific capacities are 147 m A·h/g and 179 m A·h/g at a current density of 100 m A/g and the voltage of 2.5⁴.5 V,respectively.The cathode materials retain reversible charge-discharge capacities of 180 m A·h/g and 181 m A·h/g after 50 cycles,respectively.Excellent electrochemical properties may be attributed to the octahedral Li Mn₂O₄ structure.This method is instructive for fabrication and design of excellent electrode materials for lithium ion batteries.更多还原