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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
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Stress-Matching Molecular Bridge and 3D Micro-Nano Array for High-Performance, Lightweight Composite Copper Current

Qiulong Tang1,2, Haiying Wu1,2, Xue Huang2

  • 1School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|June 18, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel lightweight 3D copper foil current collector for lithium batteries using molecular self-assembly and micro-nano electroplating. This innovation enhances energy density and battery stability, offering a promising advancement for next-generation energy storage.

Keywords:
composite current collectorinterfacial interactionlithium metal batteryself‐assembly molecules

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Polymer-based composite copper foils (CCFs) improve lithium battery energy density but face challenges with interfacial adhesion and substrate coverage.
  • Conventional CCF fabrication methods result in poor adhesion due to stress mismatch and incomplete polymer substrate coverage.

Purpose of the Study:

  • To develop a lightweight, high-performance 3D copper foil current collector (CCF) for enhanced lithium battery performance.
  • To address the limitations of conventional CCFs by improving interfacial adhesion and substrate coverage.

Main Methods:

  • A synergistic strategy combining molecular self-assembly and micro-nano electroplating was employed.
  • Trithiocyanuric acid acted as a dual-functional molecular bridge, forming Cu-S bonds and anchoring to the polymer substrate via π-π stacking and hydrogen bonding.
  • A low-temperature electrodeposited 3D micro-nano conical array was integrated onto the CCF.

Main Results:

  • The molecularly engineered CCFs exhibited an eightfold increase in specific surface area, effectively suppressing dendrite growth.
  • Full cells with an LiFePO4 cathode demonstrated exceptional cycling stability (398 cycles at 1C) and rate capability.
  • A lithium-free anode configuration with a high-voltage NCM811 cathode maintained stable operation for over 100 cycles, outperforming control cells.

Conclusions:

  • The proposed molecular-interface strategy provides a robust and strain-relieved interface for lightweight current collectors.
  • This approach enables the development of high-performance, lightweight CCFs for advanced lithium batteries.
  • The study offers a generalizable method for improving current collector design in energy storage applications.