不同合成方法对LiFeSO_4F正极材料性能的影响

Effect of different synthetic method on performance of LiFeSO_4F cathode material

LiFeSO_4F是一种新型锂离子电池用聚阴离子正极材料,由于其较高的理论能量密度和电压平台及结构稳定性,被认为是锂离子电池正极材料的备选之一。详细研究了微波法和溶剂热法对LiFeSO_4F结构和电化学性能的影响。研究结果表明,微波法合成LiFeSO_4F材料反应用时仅是溶剂热法的1/140,而且具有三维多孔结构和良好的电化学反应可逆性和稳定的充放电循环特性。

As a novel polyanion cathode materials for lithium ion batteries, LiFeSO4F with high theoretical energy density, voltage platform and structure stability is considered to be a promising candidate. The effect of microwave and solvent thermal synthetic method on the structure and electrochemical properties of LiFeSO4F cathode material was studied. It is found that the material synthesized by microwave with three-dimensional porous structure exhibits the better electrochemical performance, including good reversibility and stability in the charge and discharge cycles. Meanwhile, the reaction time is only 1/140 in comparison with materials synthesized by solvent thermal synthetic method.