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A Prussian Blue-Derived Dual-Functional Precursor for High-Performance LFP/C Cathodes.

Jianwen Su1,2, Junwen Tang1, Shaoqiu Wang3

  • 1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Langmuir : the ACS Journal of Surfaces and Colloids
|February 4, 2026
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Summary
This summary is machine-generated.

This study introduces a novel method using Prussian blue as a dual precursor to create high-performance carbon-coated lithium iron phosphate (LFP/C) cathodes for advanced lithium-ion batteries.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Olivine lithium iron phosphate (LFP) is a promising cathode material for lithium-ion batteries due to its safety and environmental benefits.
  • However, LFP suffers from poor electrical conductivity and slow lithium-ion transport, limiting its use in high-power applications.

Purpose of the Study:

  • To develop a novel, efficient method for synthesizing carbon-coated LFP (LFP/C) with enhanced electrochemical performance.
  • To utilize Prussian blue (PB) as a dual-functional precursor for both iron and carbon sources in a one-step process.

Main Methods:

  • A one-step sintering process was employed using Prussian blue (PB) as a precursor to synthesize carbon-coated LFP (LFP/C).
  • Electrochemical evaluations, including discharge capacity, rate performance, and long-term cycling stability tests, were conducted.

Main Results:

  • The synthesized LFP/C exhibited an initial discharge capacity of 160.3 mAh·g-1 at 0.2C, with excellent retention (119.1 mAh·g-1 at 6C) and capacity rebound.
  • Exceptional long-term cycling stability was demonstrated, with 96.7% and 84.3% capacity retention after 500 cycles at 1C and 5C, respectively.
  • The performance improvements are attributed to an in situ formed carbon layer and a highly ordered structure derived from the PB precursor.

Conclusions:

  • Prussian blue serves as an effective dual-functional precursor for synthesizing high-performance LFP/C materials.
  • This approach offers a straightforward and efficient pathway for developing advanced LFP/C cathodes for high-power lithium-ion batteries.