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Updated: May 9, 2026

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells
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Nonprelithiated Full Cells With 100% Micro-Silicon Anodes Enabled by Replacing Inner SEI Layer.

Song Gu1, Yan Wang1,2,3, Linze Lv1

  • 1College of Energy, Soochow University, Suzhou, Jiangsu, China.

Angewandte Chemie (International Ed. in English)
|May 8, 2026
PubMed
Summary

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This summary is machine-generated.

Researchers developed a functional molecule to create an interfacial layer on micro-silicon anodes for lithium-ion batteries. This innovation significantly improves capacity retention and electrochemical performance, paving the way for practical silicon anodes.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Micro-sized silicon (Si) offers high capacity for lithium-ion batteries (LIBs) but suffers from rapid capacity decay.
  • Practical application of Si anodes is hindered by poor cycle stability.

Purpose of the Study:

  • To develop a method for enhancing the stability and performance of micro-Si anodes.
  • To investigate the role of an in situ interfacial layer in mitigating Si anode degradation.

Main Methods:

  • A functional molecule, (2S,2'S)-N,N'-carbonylbis(2-amino-2-hydroxyacetamide), was used to form an interfacial layer on porous micro-Si.
  • The interfacial layer was characterized for its effect on pore structure and solid electrolyte interphase (SEI) formation.
  • Electrochemical performance of the modified Si anodes was evaluated in half-cells and full cells.
Keywords:
Nonprelithiated full‐celllithium‐ion batterysilicon anodesolid electrolyte interphasesurface engineering

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Main Results:

  • The interfacial layer homogenized pore structure, enabling uniform lithium-ion insertion and reducing Si phase transition.
  • A dense, thin, uniform, and LiF-rich SEI layer with good conductivity was formed.
  • Specific capacity at 10 C increased from 945 to 2041 mAh/g, with capacity retention improving from 15.9% to 64.2% after 1000 cycles.
  • Full cells showed improved initial Coulombic efficiency (83.77% to 88.11%) and capacity retention (11.5% to 71% after 100 cycles).

Conclusions:

  • The coupled structural and interfacial regulation effectively enhances the electrochemical performance of micro-Si anodes.
  • The developed functional molecule and strategy demonstrate the practical promise of 100% micro-Si anodes for next-generation LIBs.