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Updated: Jan 30, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Mitigating the Interfacial Degradation in Cathodes for High-Performance Oxide-Based Solid-State Lithium Batteries.

Dawei Wang1, Qian Sun1, Jing Luo1

  • 1Department of Mechanical and Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada.

ACS Applied Materials & Interfaces
|January 17, 2019
PubMed
Summary
This summary is machine-generated.

Solid-state lithium batteries (SSLBs) using small NMC particles improve interfacial stability and performance. This approach mitigates mechanical degradation, enhancing energy storage safety and efficiency.

Keywords:
cosinteringinterfacial degradationinternal resistancemicrocracksize regulationsolid-state lithium battery

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state lithium batteries (SSLBs) offer enhanced safety and energy density over conventional lithium-ion batteries.
  • Interfacial engineering and mechanical stability remain critical challenges, particularly with stiff oxide electrolytes.

Purpose of the Study:

  • To investigate the impact of cathode particle size on interfacial properties and electrochemical performance in SSLBs.
  • To develop strategies for improving mechanical retention and reducing interfacial resistance in oxide-based SSLBs.

Main Methods:

  • Fabrication of SSLBs using a cosintering method with Li3BO3 as a sintering agent, binding NMC cathode and LLTO solid electrolyte.
  • Comparison of SSLBs utilizing small NMC primary particles versus large NMC secondary particles.
  • Analysis of interfacial adhesion, mechanical retention, internal resistance, and electrochemical performance.

Main Results:

  • Interfacial resistance fluctuates during cycling due to microcracks induced by NMC volumetric changes, leading to overall increase.
  • Mechanical degradation at interfaces upon cycling causes capacity decay and reduced Coulombic efficiency.
  • SSLBs with small NMC particles exhibit improved particle distribution, mitigated volumetric changes, and reduced mechanical degradation, resulting in better performance.

Conclusions:

  • Optimizing cathode particle size is crucial for enhancing mechanical stability and electrochemical performance in SSLBs.
  • Small NMC primary particles offer a viable strategy to improve interfacial integrity and long-term cyclability in oxide-based SSLBs.
  • Findings provide insights for designing robust and high-performance next-generation solid-state batteries.