AlPO 4 ‐Modified 5.2 V LiCoMnO 4 Cathode With Enhanced Electrochemical Performance

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Abstract
A high‐voltage Li‐rich LiCoMnO 4 (LCMO) cathode is successfully prepared using the co‐precipitation technique and then tuned with varying concentrations of AlPO 4 coating (1, 3, 5, and 10 wt.%). Among these, the LCMO@AlPO 4 _3 wt.% shows excellent electrochemical performance with a specific capacity of 103 mAh g −1 and 71% capacity retention. This is significantly better than the pristine sample, which has a specific capacity of 91 mAh g −1 and 60% capacity retention after 100 cycles. Additionally, the Li‐diffusion coefficient is computed using electrochemical impedance spectroscopy, and the optimized coated sample exhibited a higher diffusion value. To realize the practical feasibility of such an AlPO 4 ‐modified cathode, the full‐cell is fabricated using an Li 4 Ti 5 O 12 anode under balanced loading conditions. At ambient temperature conditions, the full cell offered an energy density of 227 Wh kg −1 . To produce high‐energy next‐generation cathodes for lithium‐ion batteries, this research offers the concept of surface modification with inexpensive Li‐rich materials
Funding Information
  • National Research Foundation of Korea

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