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Carbothermal Synthesis of High-Entropy Layered Oxides for Advanced Submicron-Particle Lithium Cathodes.

Siyu Zhu1, Wei Nong1, Lei Huang2

  • 1School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.

ACS Nano
|September 17, 2025
PubMed
Summary

Researchers developed a novel laser carbothermal method to create small, high-entropy cathode materials for fiber lithium-ion batteries. This efficient process reduces waste and energy, enhancing battery performance and flexibility.

Keywords:
carbothermal synthesisflexible batterieshigh entropystrengthened hexagonal latticesubmicron-particle cathodes

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Advanced materials with small particle sizes are crucial for enhancing fiber lithium-ion battery (LIB) performance.
  • Traditional synthesis methods for LIB cathodes are often time-consuming, energy-intensive, and generate waste.

Purpose of the Study:

  • To develop a bottom-up strategy for synthesizing high-entropy doped layered cathode materials.
  • To utilize an advanced laser carbothermal technique for efficient material synthesis.

Main Methods:

  • A bottom-up strategy employing a laser carbothermal technique was used.
  • The method enabled direct bottom-up growth of heteroatomically layered oxides with an average diameter of 221 nm.
  • The synthesized material was characterized for its structural and electrochemical properties.

Main Results:

  • The laser carbothermal technique reduced synthesis time by 75% and energy consumption by 77%, with no alkali waste.
  • The synthesized high-entropy hexagonal structure effectively suppressed transition metal interlayer rearrangement.
  • Fiber LIBs using the cathode demonstrated high capacity retention (92.10% after 200 cycles in half-cell, 91.65% after 300 cycles in full-cell) and flexibility.

Conclusions:

  • The developed laser carbothermal method offers an efficient and sustainable approach for synthesizing advanced cathode materials for fiber LIBs.
  • The high-entropy layered cathodes exhibit excellent electrochemical performance and mechanical stability, suitable for flexible battery applications.
  • This work provides a promising pathway for both academic research and industrial applications in the field of flexible energy storage.