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Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
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Navigating Inner Helmholtz Plane Reactions Enables Robust Lithium Metal Anodes for 500 Wh kg-1 Pouch Cells.

Jiangning Liu1, Baoyu Sun1, Tuo Zhao1

  • 1State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.

Journal of the American Chemical Society
|July 6, 2026
PubMed
Summary

Stabilizing lithium metal anodes is key for high-energy batteries. This study introduces a new strategy to create a stable solid electrolyte interphase, improving battery performance and longevity.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Area of Science:

  • Electrochemistry
  • Materials Science
  • Battery Technology

Background:

  • Stabilizing lithium metal anodes is crucial for next-generation batteries.
  • The dynamic electrode/electrolyte interface, influenced by potential fluctuations, presents a major challenge.
  • Achieving a stable solid electrolyte interphase (SEI) is vital for battery longevity.

Purpose of the Study:

  • To develop a novel interfacial regulation strategy for stabilizing lithium metal anodes.
  • To decouple electric-field effects from interfacial reduction processes for controlled SEI formation.
  • To enhance the chemical stability, mechanical robustness, and ion transport of the SEI.

Main Methods:

  • Proposed a preoccupancy-guided interfacial regulation strategy using a Schiff-base polymer with C-F fragments.
  • Engineered a preferential surface-normal orientation at the inner Helmholtz plane to confine the interfacial environment.
  • Utilized the electron-withdrawing effect of fluorinated moieties to promote LiF-rich interphase formation.

Main Results:

  • The strategy successfully suppressed solvent access to the lithium surface, preventing uncontrolled reactions.
  • A LiF-rich interphase was preferentially formed, enhancing interfacial stability.
  • A 4.81 Ah pouch cell achieved an energy density of 502.43 Wh kg-1 and retained ~90.06% capacity after 240 cycles.

Conclusions:

  • Precise tuning of the chemical environment at the inner Helmholtz plane effectively controls interphase formation.
  • The developed strategy offers a rational approach for designing stable lithium metal/electrolyte interfaces.
  • This work paves the way for advanced lithium metal batteries with improved energy density and cycle life.