4.7 Article

Lithium-Rich Layered Oxide with a Porous Prism Architecture for High-Performance Cathode Materials of Lithium-Ion Batteries

Journal

ACS APPLIED ENERGY MATERIALS
Volume 5, Issue 9, Pages 10973-10982

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c01653

Keywords

lithium-ion battery; Li-rich layered structure; cathode materials; morphology; porous prism

Funding

  1. National Natural Science Foundation of China [51874048]
  2. Research Foundation of Education Bureau of Hunan Province [16A001]

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In this study, a porous prism architecture of Li1.2Mn0.54Ni0.13Co0.13O2 materials is successfully constructed, leading to improved initial discharge capacity and rate capability of lithium-ion batteries. The porous morphology promotes the intercalation and extraction of lithium ions, while the one-dimensional prism architecture ensures superior structural stability.
Lithium-rich layered oxides are among the most promising cathode materials for high-energy-density lithium-ion batteries (LIBs). Besides the composition and structure, the morphology of Li-rich layered materials also has significant effects on their electrochemical performance. In this work, a porous prism architecture of Li1.2Mn0.54Ni0.13Co0.13O2 materials is constructed via a coprecipitation solvothermal method and subsequent heat treatment. Appropriate concentrations of transition metal ions and oxalic acid as the precipitant used in synthesis govern the growth of the porous prism structure. When employed as a cathode material for LIBs, the optimized material achieves a high initial discharge capacity of 295.3 mAh g-1 at 0.1C and excellent rate capability of 150.6 mAh g-1 even at 5.0C. These outstanding performances can be attributed to the synergistic effect of the porous morphology and one-dimensional prism architecture. In particular, the porous morphology promotes the intercalation and extraction of Li+ while the prism architecture is associated with the observed superior structural stability. This architecture opens a promising avenue for the development of high-performance cathode materials in LIBs.

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