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Related Concept Videos

Electrolysis03:00

Electrolysis

In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...

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Bromine-Modified Graphite for High-Rate and Stable K-Storage.

Ting Luo1, Jing Zheng2, Zixia Lin3

  • 1Jiangsu key Laboratory of Electrochemical Energy Storage Technologies, Department of Applied Chemistry, College of Materials Science and Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing, P. R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 19, 2026
PubMed
Summary
This summary is machine-generated.

Bromine-modified graphite anodes enhance potassium-ion battery performance. This cost-effective method improves cycling stability and rate capability for practical applications.

Keywords:
K‐storage kineticsbromine modificationgraphite anodepotassium‐ion batteriesrate performance

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Graphite is a promising anode for potassium-ion batteries (PIBs) due to its cost and conductivity.
  • However, large K+ ions hinder kinetics and degrade graphite structure, limiting performance.
  • Improving graphite anode stability and kinetics is crucial for advanced PIBs.

Purpose of the Study:

  • To develop a high-performance anode material for potassium-ion batteries.
  • To address the limitations of graphite anodes in PIBs, specifically sluggish kinetics and poor cycling stability.
  • To present a practical and cost-effective synthesis strategy for enhanced graphite anodes.

Main Methods:

  • Synthesized a bromine-modified graphite (Br-Gr) composite using a hexabromobenzene-assisted one-step carbonization method.
  • Investigated the electrochemical performance of the Br-Gr composite as an anode material in PIBs.
  • Evaluated reversible discharge capacity, high-rate capacity, cycling stability, and reaction reversibility.

Main Results:

  • The optimized Br-Gr composite exhibited a reversible discharge capacity of 310.1 mAh g⁻¹ at 50 mA g⁻¹.
  • A high-rate capacity of 109.5 mAh g⁻¹ was achieved at 1000 mA g⁻¹.
  • The Br-Gr anode demonstrated excellent cycling stability and high reaction reversibility.

Conclusions:

  • Bromine modification effectively enhances the potassium storage performance of graphite anodes.
  • The developed Br-Gr composite offers a practical and cost-effective solution for high-performance PIBs.
  • This strategy holds promise for the commercial application of advanced anode materials in PIBs.