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Taming Transport Gradients: Engineered Microstructures for Fast-Charging Thick Electrodes.

Xinya Niu1, Yuyang Lu2, Pengcheng Chen1

  • 1Department of Modern Mechanics, University of Science and Technology of China, Hefei, China.

Small (Weinheim an Der Bergstrasse, Germany)
|May 24, 2026
PubMed
Summary
This summary is machine-generated.

Thick electrodes for batteries face challenges like slow charging and degradation. The "Match Principle" aligns structural gradients with flux gradients to optimize performance and durability in these advanced electrodes.

Keywords:
charge‐transport kineticsmatch principlesmechanical damage heterogeneitystructural designthick electrodes

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Thick electrodes are crucial for high energy density batteries but suffer from lithium transport limitations and mechanical degradation.
  • These issues stem from heterogeneous electrochemical environments causing intrinsic flux gradients (ionic, electronic, reaction-driven) along electrode thickness.

Purpose of the Study:

  • To introduce and explain the "Match Principle" as a unifying design framework for thick electrodes.
  • To demonstrate how aligning structural gradients with flux gradients can overcome performance barriers.

Main Methods:

  • Theoretical foundation of the "Match Principle" is presented.
  • Recent fabrication advances for gradient-designed thick electrodes are summarized.

Main Results:

  • Gradient structural designs (porosity, conductivity, particle size) that match flux gradients optimize charge transport kinetics.
  • Mitigation of damage heterogeneity leads to improved electrode performance and durability.

Conclusions:

  • The "Match Principle" offers a pathway to overcome limitations in fast charging and mechanical degradation of thick electrodes.
  • Advanced manufacturing, characterization, and AI-assisted design are key for industrializing next-generation thick electrodes.