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Batteries

Breakthrough in Sodium-Ion Battery Technology: Nickel-Cobalt Bimetallic Coordination Polymer-Derived Nanosheets

Strategic Insights

— 2 min read

Researchers from Guangzhou University have developed a novel nickel-cobalt bimetallic coordination polymer (NiCoCP) that has the potential to revolutionize sodium-ion battery technology. According to a recent study published in Acta Metallurgica Sinica (English Letters), the NiCoCP-derived nanosheets exhibit superior rate performance and long-lasting cycle life, making them an attractive alternative to lithium-ion batteries.

The research team, led by Haosen Fan, synthesized the NiCoCP using a coprecipitation method and obtained a CoSe2@NiSe2 cross-stacked structure through high-temperature carbonization and selenization processes. The CoSe2@NiSe2 nanosheets have a unique heterostructure and carbon film that synergistically increases the number of adsorption sites and alleviates the diffusion energy barrier, thereby improving the rapid diffusion kinetics of Na+ ions.

Key Takeaways:

  • The NiCoCP-derived nanosheets exhibit superior rate performance and long-lasting cycle life, making them an attractive alternative to lithium-ion batteries.
  • The CoSe2@NiSe2 nanosheets have a unique heterostructure and carbon film that synergistically increases the number of adsorption sites and alleviates the diffusion energy barrier.
  • The specific capacity of CoSe2@NiSe2 is around 460 mA h g(-1) after 400 cycles at 1.0 A g(-1) for sodium-ion batteries (SIBs).
  • CoSe2@NiSe2 also exhibits excellent cycling stability, maintaining a specific capacity of 160 mA h g(-1) after 700 cycles at 1.0 A g(-1) for potassium-ion batteries (PIBs).
  • This study provides a new way to prepare metal selenide heterostructure as the promising anode material for SIBs.
  • Researchers obtained financial support from the National Natural Science Foundation of China (NSFC) and the National Natural Science Foundation of Guangdong Province.
  • Guangzhou University's School of Chemistry and Chemical Engineering was involved in this research, with Haosen Fan leading the research team.

Statistics:

  • The specific capacity of CoSe2@NiSe2 is around 460 mA h g(-1) after 400 cycles at 1.0 A g(-1) for SIBs.
  • CoSe2@NiSe2 also exhibits excellent cycling stability, maintaining a specific capacity of 160 mA h g(-1) after 700 cycles at 1.0 A g(-1) for PIBs.
  • The researchers used a coprecipitation method to synthesize the NiCoCP.
  • The CoSe2@NiSe2 nanosheets have a unique heterostructure and carbon film.

Sources:

  • Acta Metallurgica Sinica (English Letters), "Cobalt-nickel Cyano Coordination Polymer-derived Square Cose 2 @nise 2 Nanosheets for Advanced Na + /k + Batteries," 2025.
  • NewsRx, "Recent Findings from Guangzhou University Has Provided New Information about Nanosheets (Cobalt-nickel Cyano Coordination Polymer-derived Square Cose 2 @nise 2 Nanosheets for Advanced Na + /k + Batteries)," July 20, 2025; p 2710.

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