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Title: Lattice engineering of high-entropy olivine-type lithium metal phosphate as high-voltage cathodes

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/5.0201709 · OSTI ID:2349202
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [3];  [1]; ORCiD logo [4]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
  3. University of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division; University of Tennessee, Knoxville, TN (United States)

Engineering of high-entropy cathode materials for lithium-ion batteries has been actively pursued owing to the outstanding conductivity of high-entropy materials benefited from the maximum entropy and unique antisite disordering structure. Olivine lithium metal phosphates such as LiMnPO4 and LiNiPO4 feature high working voltages but low capacities due to their insulation nature. Here in this work, the synthesis of the high-entropy lithium metal phosphate materials (HELMPs) is realized by combining mechanochemistry with a calcination method. By regulating lattice of HELMPs, the high-entropy Li(Mn0.35Fe0.35Co0.1Mg0.1Ca0.1)PO4 reveals three typical high-voltage plateaus in charge–discharge curves corresponding to the redox of Fe, Mn, and Co in the voltage range of 2.0–4.9 V vs Li+/Li, and a much higher initial capacity than LiMnPO4 (104 vs 15 mAh g-1).

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2349202
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 124; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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