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Related Experiment Video

Updated: Jul 4, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

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Published on: August 12, 2013

A Selective-Transport Elastomeric Coating Regulating Hierarchical Solid Electrolyte Interphase for Low-Temperature

Hang Ding1, Linming Bai2, Xinyuan Shan3

  • 1State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|July 3, 2026
PubMed
Summary

A novel siloxane coating creates a dual-layer solid electrolyte interphase (SEI) for lithium metal batteries (LMBs). This enhances low-temperature performance and cycling stability by combining flexibility and ion transport.

Keywords:
functional elastomerslow‐temperature lithium‐metal batteriespolymeric protective layerspolysiloxanessolid electrolyte interphases

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Low-temperature performance of lithium metal batteries (LMBs) is limited by the solid electrolyte interphase (SEI) on the lithium anode.
  • Conventional SEI strategies using electrolyte modification yield organic-rich SEIs (poor dendrite inhibition, slow ion kinetics) or inorganic-rich SEIs (brittle at low temperatures).
  • Effective SEI design is crucial for stable and efficient LMBs, especially under demanding conditions.

Purpose of the Study:

  • To develop a direct method for constructing a stable, flexible, and ionically conductive SEI for LMBs.
  • To improve the low-temperature cycling performance and interfacial stability of LMBs.
  • To create a double-layer SEI combining organic and inorganic components for synergistic benefits.

Main Methods:

  • Application of a siloxane-based elastomeric coating directly onto the lithium metal anode surface.
  • Leveraging the coating's solvent phobicity to guide the formation of a LiF-rich inner SEI.
  • Characterization using theoretical calculations and experimental validation of the double-layer SEI structure and properties.
  • Performance testing of LMBs with the modified anode under low-temperature conditions (-25°C).

Main Results:

  • A double-layer SEI composed of a LiF-rich inner layer and an organic-inorganic outer layer was successfully constructed.
  • The SEI demonstrated enhanced mechanical flexibility and promoted Li+ transport.
  • LMBs with the coated anode achieved 99% capacity retention over 300 cycles at -25°C when paired with NCM811 cathodes.
  • The method allows direct SEI manipulation and is compatible with diverse electrolyte systems.

Conclusions:

  • The siloxane-based coating effectively engineers a synergistic double-layer SEI, overcoming limitations of conventional approaches.
  • This strategy significantly enhances the low-temperature cycling stability and interfacial integrity of lithium metal batteries.
  • The direct SEI modification approach offers a versatile pathway for advancing high-performance LMB technology.