论文标题
Life 0.6MN0.4PO4橄榄石阴极的合成和表征用于在新的锂聚合物电池中
Synthesis and Characterization of a LiFe0.6Mn0.4PO4 Olivine Cathode for Application in a New Lithium Polymer Battery
论文作者
论文摘要
Life0.6MN0.4PO4（LFMP）在此处合成和表征利用橄榄石结构的阴极在锂细胞中的结构，形态和电化学特征方面进行了特征。该材料显示了由于Fe+2/Fe+3和Mn+2/Mn+3氧化还原夫妻的li+/li的电化学过程的可逆性，该过程在3.5和4 V与Li+/li中进化。 LFMP具有X射线衍射揭示的明确定义的橄榄石结构，X射线衍射是由扫描和透射电子显微镜所表明的，由汇总成微米簇组成的子微米颗粒组成，碳重量比约为4％，如热速率所示。该电极用于用传统液体电解质进行液压循环的锂细胞中，并显示出130 mAh G-1的最大容量，令人满意的速率能力，出色的效率和稳定的趋势。因此，将材料在锂金属聚合物细胞中进行研究，该锂基于聚乙二醇二甲基乙醚的电解质，并具有固体构型。该单元在容量，效率和保留率方面揭示了非常有希望的特征，并建议LFMP材料作为适合聚合物电池的合适电极，其特征在于能量密度增加和明显的安全性。
A LiFe0.6Mn0.4PO4 (LFMP) cathode exploiting the olivine structure is herein synthesized and characterized in terms of structure, morphology, and electrochemical features in a lithium cell. The material shows reversibility of the electrochemical process which evolves at 3.5 and 4 V versus Li+/Li due to the Fe+2/Fe+3 and Mn+2/Mn+3 redox couples, respectively, as determined by cyclic voltammetry. The LFMP has a well-defined olivine structure revealed by X-ray diffraction, a morphology consisting of submicron particle aggregated into micrometric clusters as indicated by scanning and transmission electron microscopy, with a carbon weight ratio of about 4% as suggested by thermogravimetry. The electrode is used in lithium cells subjected to galvanostatic cycling with a conventional liquid electrolyte, and demonstrates a maximum capacity of 130 mAh g-1, satisfactory rate capability, excellent efficiency, and a stable trend. Therefore, the material is studied in a lithium metal polymer cell exploiting an electrolyte based on polyethylene glycol dimethyl ether with a solid configuration. The cell reveals very promising features in terms of capacity, efficiency, and retention, and suggests the LFMP material as a suitable electrode for polymer batteries characterized by increased energy density and remarkable safety.
