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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Stereolithography Three-Dimensional Printing Solid Polymer Electrolytes for All-Solid-State Lithium Metal Batteries.

Yingjie He1, Shaojie Chen1, Lu Nie1

  • 1School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.

Nano Letters
|August 29, 2020
PubMed
Summary

Researchers developed a 3D-printed solid polymer electrolyte (SPE) for safer, high-energy all-solid-state lithium metal batteries (ASSLMBs). This innovative SPE enhances interfacial contact and ion transport, significantly improving battery performance and longevity.

Keywords:
3D printingSolid-state Li metal batteriesinterface resistancesolid polymer electrolytesstereolithography

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • All-solid-state lithium metal batteries (ASSLMBs) offer enhanced safety and energy density.
  • Poor interfacial contact between solid components remains a significant challenge for ASSLMB performance.

Purpose of the Study:

  • To develop a novel solid polymer electrolyte (SPE) using stereolithography (SLA) 3D printing for ASSLMBs.
  • To improve interfacial contact, ion transport, and overall battery performance in ASSLMBs.

Main Methods:

  • Fabrication of a stereolithography (SLA) 3D printed solid polymer electrolyte (SPE) with an Archimedean spiral structure.
  • Characterization of ionic conductivity and interfacial properties of the 3D printed SPE.
  • Assembly and electrochemical testing of Li|3D-SPE|LFP cells.

Main Results:

  • The SLA 3D printed SPE demonstrated a high ionic conductivity of 3.7 × 10-4 S cm-1 at 25 °C.
  • The 3D-Archimedean spiral structure improved interfacial adhesion and Li-ion transport.
  • Li|3D-SPE|LFP cells exhibited reduced interfacial impedance and a specific capacity of 128 mAh g-1 after 250 cycles, outperforming structure-free SPE cells (32 mAh g-1).

Conclusions:

  • SLA 3D printing is a promising technology for fabricating high-performance SPEs for ASSLMBs.
  • The rationally designed 3D structure of the SPE effectively addresses interfacial challenges in ASSLMBs.
  • This approach paves the way for next-generation high-energy and safe energy storage devices.