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Percolative Metal Microweb-Based Flexible Lithium-Ion Battery with Fast Charging and High Energy Density.

Hongseok Jo1, Ju Hyoung Park1,2, Daekyu Choi1,2

  • 1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
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Summary

Researchers developed a novel 3D metal microweb electrode for flexible lithium-ion batteries (LIBs). This design enhances energy density and mechanical durability, paving the way for advanced wearable electronics.

Keywords:
3D network structureelectrospinningflexible electrodeflexible lithium‐ion batterypercolative metal microweb

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Flexible lithium-ion batteries (LIBs) face challenges balancing mechanical flexibility with high energy density.
  • Conventional electrode designs often involve trade-offs between these critical performance metrics.

Purpose of the Study:

  • To introduce a novel percolative metal microweb-based electrode for flexible LIBs.
  • To improve energy density and mechanical durability in LIBs through an innovative electrode architecture.

Main Methods:

  • Fabrication of a three-dimensional (3D) metal microweb electrode using electrohydrodynamic processes.
  • Characterization of the electrode's electrical properties, mechanical durability, and electrochemical performance.

Main Results:

  • The 3D microweb electrode exhibits exceptional electrical properties and mechanical durability.
  • Reduced current collector weight and enhanced electrolyte contact area improved energy density and lithium-ion diffusion.
  • The full cell achieved high energy (110 W kg⁻¹) and power densities (1,048 W kg⁻¹ at 10 C), surpassing existing LIBs with similar materials.

Conclusions:

  • The novel microweb electrode design significantly enhances LIB performance.
  • This lightweight, durable electrode architecture is crucial for advancing wearable and flexible electronic devices.