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Batteries

Breakthrough in Sodium-Ion Battery Technology: Synthesis of High-Performance Cathode Material

Strategic Insights

— 1 min read

Researchers from the Chinese Academy of Sciences have made a significant discovery in the development of sodium-ion batteries, a crucial component in electric vehicles and renewable energy systems. By employing a novel lithium substitution modulation strategy, the team has successfully synthesized a prismatic NaNiMnLiO (P-NNMLO) cathode with enhanced sodium-ion diffusion kinetics, improved rate capability, and prolonged cycle life.

Key Takeaways:

  • The researchers discovered that the lithium substitution in the crystal lattice of P-NNMLO cathodes can suppress the P2-O2 phase transition at high voltages and mitigate the volume change during cycling.
  • The P-NNMLO cathode exhibits a high initial reversible capacity of 123.4 mAh g at 1 C with a capacity retention of 80.6% after 100 cycles and a rate capability of 59.6 mAh g at 20 C.
  • The study offers insights into the design of high-rate and long-cycle sodium-ion batteries by optimizing the crystal facet orientation and structural robustness of layered oxide cathodes.
  • Peiyao Wang and Ke Xiao led the research team, which included Jin Bai, Yuanyuan Liu, Siya Wang, Shiyu Qiu, Xianlong Wang, Xuebin Zhu, Bangchuan Zhao, and Yuping Sun.
  • The study has been peer-reviewed and published in ACS Applied Materials & Interfaces.

Statistics:

  • The P-NNMLO cathode achieves a high initial reversible capacity of 123.4 mAh g at 1 C.
  • The capacity retention is 80.6% after 100 cycles.
  • The rate capability is 59.6 mAh g at 20 C.
  • The lithium substitution modulation strategy enables improved sodium-ion diffusion kinetics, reduced P2-O2 phase transition energy, and enhanced structural stability.

Sources:

  • ACS Applied Materials & Interfaces, 2025
  • Peiyao Wang, Ke Xiao, Jin Bai, Yuanyuan Liu, Siya Wang, Shiyu Qiu, Xianlong Wang, Xuebin Zhu, Bangchuan Zhao, Yuping Sun. Synergetic Modulation of Crystal Facet Orientation and Lattice Stability by Lithium Substitution in P2-Type Layered Oxides for Enhanced Sodium Storage. ACS Applied Materials & Interfaces, 2025.
  • Chemicals & Chemistry, October 24, 2025; p 433

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