High temperature electrochemical performance of hydrothermally prepared LiMn1-xMxPO4 (M = Fe, Mg)

作者：Nava Avendano J; Palacin M R; Oro Sole J; Ponrouch A; Tarascon J M; Recham N^*

来源：Solid State Ionics, 2014, 263: 157-160.

DOI：10.1016/j.ssi.2014.06.007

• LiMn1-xMxPO4
• Olivine
• Batteries
• High temperature electrochemistry

We report on the hydrothermal synthesis of LiMn1-xMxPO4 where x = 0.1, 0.2, 0.5, 0.8 and LiMn0.9Mg0.1PO4 at 260 degrees C, using water-EMI_TESI mixture as reacting medium. Electrochemical tests carried out in galvanostatic mode at 100 degrees C show that LiMn0.5Fe0.5PO4 presents the best performance in terms of capacity (ca.120 mAh/g), therefore this capacity is equally parted between 3.5 and 4.1 V plateaus. This contrasts with LiMn0.9Mg0.1PO4 which is more attractive energy density wise, as it exhibits a single reversible plateau having a capacity of 120 mAh/g at higher voltage (ca. 4.1 V vs. Li+/Li).

• 出版日期2014-10-1