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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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Published on: September 20, 2012

Mechanically Interlocked Core-Shell Architecture for Stable Nickel-Rich Cathodes.

Xingjie Chen1, Ying Luo2, Fan Yang1

  • 1Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China.

Nano Letters
|June 19, 2026
PubMed
Summary
This summary is machine-generated.

A novel bulk-surface modification strategy enhances nickel-rich layered cathodes (NCM) for lithium-ion batteries. This approach improves durability by stabilizing the interface and suppressing side reactions, boosting battery performance.

Keywords:
anchored structureinterphase stabilitylithium-ion batteriesnickel-rich cathodeprolonged cycle

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Nickel-rich layered cathodes (NCM) are crucial for next-generation lithium-ion batteries due to their high energy density.
  • However, NCM materials suffer from rapid capacity decay, primarily due to interfacial side reactions and microcracking.

Purpose of the Study:

  • To develop a synergistic bulk-surface modification strategy to enhance the structural and electrochemical stability of Ni-rich layered cathodes.
  • To investigate the effects of Nb5+ embedding and NiNb2O6 (NNO) coating on NCM cathode performance.

Main Methods:

  • A bulk-surface synergistic modification strategy was employed, involving Nb5+ embedding into the NCM structure and coating with NiNb2O6 (NNO).
  • The modified Nb-NCM@NNO cathode was characterized using electrochemical testing, including rate capability and cycling stability assessments.

Main Results:

  • Nb incorporation induced local lattice distortion, creating a mechanically anchored interface that stabilized the NNO coating and expanded interlayer spacing for improved Li+ transport.
  • The NNO coating effectively suppressed electrolyte penetration and HF-induced corrosion, reducing byproduct formation and transition-metal-ion dissolution.
  • The Nb-NCM@NNO cathode demonstrated a rate capability of 177.76 mAh g-1 at 5.0 C and retained approximately 88.24% of its capacity after 200 cycles.

Conclusions:

  • The synergistic bulk-surface modification strategy effectively enhances the durability and electrochemical performance of Ni-rich layered cathodes.
  • This interfacial anchoring route provides a promising approach for developing high-performance, long-lasting lithium-ion batteries.