Abstract
A two-step solution chemistry route was used to synthesize ternary Chevrel phase (Cu2Mo6S8) with 5 h annealing at 1000°C under reducing atmosphere. The approach marks a synthesis route different from hitherto described conventional solid-state methods. X-ray diffraction and scanning electron micrograph shows the formation of ∼1–1.5 μm size cuboidal shape Cu2Mo6S8 crystals with unit cell dimensions a ∼ 0.96245 nm and c ∼ 1.01987 nm of molar volume ∼818.14 × 10−3 nm3. De-cuprated Mo6S8 exhibits a discharge capacity ∼76 mAhg−1 with good capacity retention up to ∼50 cycles when cycled at the current rate of 20 mA/g (∼C/6). The excellent rate capability and high Coulombic efficiency (∼99.3% at ∼1.5C rate) of the Mo6S8 cathode renders the solution chemistry route an alternative approach for the synthesis of cuprated Chevrel phase: a known cathode system for magnesium battery.
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