VOx-coated LiMn2O4 spinel nanorodclusters as a lithium battery cathode material are prepared by mixing OV(CH3H7)3 dissolved in ethanol and LiMn2O4 powder consisting of nanorodclusters and firing this mixture at 700 °C. In the coated spinel, the V atoms are distributed within ∼30 nm of the particle surface without showing any coating layer, indicating the possible formation of a solid solution (LiMn2−xVxO4). The coated nanorodclusters exhibit a comparable rate capability to an uncoated counterpart, showing a discharge capacity of 117 mAh g−1 at a rate of 7 C (= 1400 mA g−1), which corresponds to 89% of the capacity retention ratio at room temperature. Further, the coated cathode exhibits excellent structural stability in storage at 80 °C for 24h; a significantly decreased amount of Mn dissolution (60 ppm) is observed, in contrast to that of an uncoated counterpart (5000 ppm).
Fetching data from CrossRef. This may take some time to load.