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Breakthrough in Potassium-Ion Batteries: New Anode Material Shows Exceptional Performance

Strategic Insights

— 1 min read

Researchers from the South China University of Technology have made a significant discovery in the development of potassium-ion batteries. By synthesizing black liquor-derived carbon anodes with precisely controlled nitrogen content and specific surface area, they have achieved exceptional electrochemical performance. The anode exhibited high capacities of 389.2 mAh g after 200 cycles at 100 mA g, 288.2 mAh g after 2500 cycles at 1000 mA g, and 183.7 mAh g after 5000 cycles at 2000 mA g. This breakthrough paves the way for the development of high-performance potassium-ion batteries.

Key Takeaways:

  • The researchers developed a new anode material by synthesizing black liquor-derived carbon anodes with precisely controlled nitrogen content and specific surface area.
  • The anode exhibited exceptional electrochemical performance, with high capacities of 389.2 mAh g after 200 cycles at 100 mA g, 288.2 mAh g after 2500 cycles at 1000 mA g, and 183.7 mAh g after 5000 cycles at 2000 mA g.
  • The adsorption ratio was found to be linear and quantitatively regulated by average adsorption sites, contributing to exceptional electrochemical performance.
  • The anode achieved superior electrolyte wettability, low adsorption energy, and an ultrahigh adsorption contribution.
  • The study demonstrated the importance of rationally regulating the nitrogen content and specific surface area in carbon anodes for potassium-ion batteries.
  • The research has been peer-reviewed and published in the journal Small.

Statistics:

  • The anode exhibited a capacity of 389.2 mAh g after 200 cycles at 100 mA g.
  • The anode showed a capacity of 288.2 mAh g after 2500 cycles at 1000 mA g.
  • The anode maintained a capacity of 183.7 mAh g after 5000 cycles at 2000 mA g.
  • The adsorption ratio was found to be linear and quantitatively regulated by average adsorption sites.
  • The anode achieved low adsorption energy and superior electrolyte wettability.

Sources:

  • "Quantitatively Regulated Adsorption Behavior of Black Liquor-Derived Carbon Anode for High-Performance Potassium-Ion Batteries." Small 2025.
  • South China University of Technology. "Findings in Science (Quantitatively Regulated Adsorption Behavior of Black Liquor-Derived Carbon Anode for High-Performance Potassium-Ion Batteries)." Chemicals & Chemistry, July 11, 2025.
  • NewsRx. "South China University of Technology Reports Findings in Science (Quantitatively Regulated Adsorption Behavior of Black Liquor-Derived Carbon Anode for High-Performance Potassium-Ion Batteries)." Chemicals & Chemistry, July 11, 2025, p 5313.

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