Chromium doped LiNi0.5Mn1.5O4 cathode materials for lithium ion battery was synthesized by sol-gel method using metal acetates as precursor and citric acid as chelating agents. The formed gel was dried at 150oC for 12-hours and decomposed at 400oC for 4 hours. Amorphous precursor was calcined at 700oC, 800oC, 900oC for 12-hours. The structure and electrochemical performance of the calcined cathode materials were characterized by Scanning electron microscope (SEM), X-ray diffraction (XRD), Electron paramagnetic resonance (EPR), and galvanostatic charge-discharge studies. The cathode materials demonstrate a homogeneously distributed spherical morphology and exhibit a good reversibility. The Cr doped cathode material synthesized at 900oC for 12-hours offered the highest initial discharge capacity compared with the un-doped cathode material and shows good cycle-life performance.

Chromium doped high voltage LiNi0.5Mn1.5O4 spinel-cathode materials for lithium ion batteries

243rd National Meeting (2012)

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