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Recent Progress in Silicon-Based Materials for Performance-Enhanced Lithium-Ion Batteries.

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  • 1Hunan Institute of Science and Technology, College of Mechanical Engineering, Yueyang 414006, China.

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Summary

Silicon (Si) anodes offer high energy density for lithium-ion batteries (LIBs) but face challenges. This review details modification strategies like structural design and alloying to improve Si anode stability and conductivity for practical LIB applications.

Keywords:
Si—based materialsanodelithiation/de−lithiation mechanismlithium−ion batteriesmodification strategy

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Silicon (Si) is a promising anode material for high energy density lithium-ion batteries (LIBs) due to its high theoretical capacity and abundance.
  • However, practical application is limited by large volume expansion, unstable solid electrolyte interphase (SEI) formation, and low intrinsic conductivity.

Purpose of the Study:

  • To review recent modification strategies for enhancing the electrochemical performance of Si-based anodes.
  • To summarize methods that suppress structural collapse and improve electrical conductivity in Si anodes.
  • To discuss factors like pre-lithiation, surface engineering, and binders for performance improvement.

Main Methods:

  • Summarizing recent literature on Si anode modification techniques.
  • Categorizing methods into structural design, oxide complexing, and Si alloys.
  • Reviewing in situ/ex situ characterization techniques to understand enhancement mechanisms.

Main Results:

  • Various strategies effectively address volume expansion and conductivity issues in Si anodes.
  • Structural design, oxide complexing, and Si alloys show promise in improving cycling stability and rate capabilities.
  • Pre-lithiation, surface engineering, and binders offer additional performance enhancements.

Conclusions:

  • Si-based anodes have significant potential for next-generation LIBs.
  • Continued research into advanced modification strategies is crucial for overcoming existing challenges.
  • Future development should focus on scalable and cost-effective solutions for practical Si anode implementation.