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Integrated Local-Microstructure Engineering Toward Mechanochemically Robust Ultra-High Nickel Cathodes.

Zhouyue Li1, Yike Jin1, Ning Qin1

  • 1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|June 12, 2026
PubMed
Summary

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Magnesium and Niobium co-doping creates a robust ultra-high nickel cathode for advanced lithium-ion batteries, improving stability and energy density for practical applications.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Ni-rich layered cathodes are crucial for high-energy-density lithium-ion batteries.
  • Challenges include mechanical failure and interfacial instability with increased nickel content.
  • Practical application is hindered by these limitations.

Purpose of the Study:

  • To develop a stable and mechanically robust ultra-high nickel cathode.
  • To enhance the performance of LiNi0.95Co0.03Mn0.02O2 through local lattice regulation.
  • To overcome the limitations of current Ni-rich cathode materials.

Main Methods:

  • Co-doping with Magnesium (Mg) and Niobium (Nb) to regulate the local lattice.
  • Constructing a chemically and mechanically robust cathode structure from surface to bulk.
Keywords:
bulk mechanical failureintegrated local‐microstructure engineeringinterfacial chemistry instabilityultra‐high nickel cathodes

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  • Utilizing surface reconstruction and bulk structural modifications.

    • Main Results:

    • Achieved a surface-reconstructed ultrathin disordered rock-salt phase for interface stabilization.
    • Integrated a bulk cation-disordered structure with a spinel-like phase to mitigate strain and enhance integrity.
    • Demonstrated excellent long-term cycling stability, high rate capability, and thermal stability.
    • Reported high initial coulombic efficiency (93.24%) and specific capacity (240.11 mAh·g⁻¹ at 0.1C).
    • Maintained 97.37% capacity after 100 cycles at 1C and 81.65% after 500 cycles at 3C.
    • Delivered 147.43 mAh·g⁻¹ at a high rate of 15C.

    Conclusions:

    • The Mg/Nb co-doping strategy effectively creates a chemically and mechanically robust ultra-high nickel cathode.
    • The integrated microstructure regulation enhances structural integrity and electrochemical interface stability.
    • This approach paves the way for the commercialization of ultra-high-nickel cathodes in next-generation high-energy-density batteries.