Abstract
The olivine-type LiMn x Fe 1− x PO 4 crystals are fabricated through the crystallization of Li 2O–MnO 2–Fe 2O 3–P 2O 5 glasses, and the lithium ion battery performance (electrochemical charge/discharge patterns) for the glass–ceramics with LiMn x Fe 1− x PO 4 crystals is examined. It is found that homogeneous glasses are obtained for the stoichiometric compositions corresponding to LiMn x Fe 1− x PO 4 with 0 ≤ x ≤ 0.8 in a conventional melt-quenching method in air. The heat treatment of the mixtures of glass powders and glucose (5 wt%) at crystallization temperatures (∼550 °C) in a reducing atmosphere of 7%H 2–93%Ar gives the formation of the olivine-type LiMn x Fe 1− x PO 4 crystals. The charge/discharge curves exhibit the plateaus at the voltage of ∼3.4 and 4.1 V.
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