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Three-Dimensional Rigidity-Reinforced SiO Anodes with Stabilized Performance Using an Aqueous Multicomponent Binder

Tianxing Kang1, Jiahui Chen1,2, Yan Cui1,2

  • 1School of Chemistry and Environment , South China Normal University , Guangzhou 510006 , P. R. China.

ACS Applied Materials & Interfaces
|June 27, 2019
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Summary

Researchers developed a novel 3D rigidity-reinforced silicon oxide (SiO) anode using a multicomponent binder (PAM/SBR/PTFE) for stable lithium-ion battery performance. This binder system enhances electrode integrity and electrochemical stability.

Keywords:
SiO basedaqueous multicomponent binderslithium-ion batteriesrigidity-reinforced anodestabilized electrochemical performances

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Silicon oxide (SiO) anodes offer high theoretical capacity for lithium-ion batteries but suffer from significant volume expansion during cycling, leading to performance degradation.
  • Developing stable anode materials is crucial for advancing next-generation energy storage solutions.
  • Existing binders often fail to mitigate the mechanical stresses associated with silicon anode volume changes.

Purpose of the Study:

  • To design and synthesize a 3D rigidity-reinforced SiO anode using aqueous multicomponent binders.
  • To stabilize the electrochemical performance of SiO anodes by addressing the volume expansion issue.
  • To investigate the synergistic effects of different binder components on anode structural integrity and electrochemical properties.

Main Methods:

  • Preparation of SiO anodes utilizing four types of aqueous multicomponent binders: polyacrylamide (PAM), poly(tetrafluoroethylene) (PTFE), carboxymethyl cellulose, and styrene butadiene rubber (SBR).
  • Characterization of the structural, adhesive, and electrolyte absorption properties of the prepared anodes.
  • Evaluation of the electrochemical performance, including cycling stability and rate capability, of the SiO anodes with different binder formulations.

Main Results:

  • The SiO anode with the PAM/SBR/PTFE (PSP) binder exhibited a 3D rigidity-reinforced structure, enhanced adhesive force, and optimized electrolyte adsorption.
  • The PSP663 binder formulation significantly stabilized electrochemical performance, achieving a retention capacity of 770 mAh g-1 at 500 mA g-1 after 300 cycles.
  • A high rate capacity of 993 mAh g-1 at 1200 mA g-1 was recorded, demonstrating excellent rate performance.
  • PTFE provided chemical stability against electrolyte corrosion, SBR ensured strong adhesion and structural support, and PAM effectively limited SiO particle expansion.

Conclusions:

  • The 3D rigidity-reinforced SiO anode utilizing the aqueous PSP663 binder demonstrates remarkable stability and high electrochemical performance.
  • The synergistic combination of PTFE, SBR, and PAM in the binder system effectively addresses the volume expansion challenge in silicon anodes.
  • This approach offers a promising strategy for developing high-performance and durable silicon-based anodes for practical lithium-ion battery applications.