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Related Concept Videos

Energy In A Magnetic Field01:24

Energy In A Magnetic Field

If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

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Related Experiment Video

Updated: Jul 2, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Layer-by-Layer Assembled Graphite/Silicon/Graphite Anode via Magnetron Sputtering for High-Energy-Density Lithium-Ion

Haoyang Tong1, Min Zhong1,2, Hongtao Xu3

  • 1Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

ACS Applied Materials & Interfaces
|November 21, 2025
PubMed
Summary

This study developed multilayered graphite/silicon/graphite anodes for high-energy lithium-ion batteries (LIBs). These anodes improve silicon

Keywords:
anodegraphite/silicon/graphitehigh-energy-densitylithium-ion batteriesmagnetron sputteringmultilayer structures

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Silicon is a promising anode material for high-energy-density lithium-ion batteries (LIBs).
  • Silicon anodes suffer from low conductivity and significant volume changes during cycling.
  • Existing anode designs struggle to mitigate these issues, limiting LIB performance.

Purpose of the Study:

  • To develop novel multilayered graphite/silicon/graphite (SG/Si/SG) anodes for next-generation LIBs.
  • To address the challenges of low conductivity and volume variation in silicon anodes.
  • To enhance the stability and energy density of LIBs through advanced anode architecture.

Main Methods:

  • Assembly of unique multilayered SG/Si/SG and SG/(Si/SG)5 hybrid anodes on copper collectors.
  • Utilized magnetron sputtering combined with a coating process for anode fabrication.
  • Investigated the structural integrity and electrochemical performance of the fabricated anodes.

Main Results:

  • The SG/Si/SG anode demonstrated an initial lithiation capacity of 589.4 mAh g-1 and 86.5% initial Coulombic efficiency (ICE).
  • After 300 cycles at 1C, it retained 381.8 mAh g-1 with 102.3% capacity retention.
  • The SG/(Si/SG)5 anode showed high initial areal capacity (3.433 mAh cm-2) and ICE (89.9%) under high loading.

Conclusions:

  • The multilayered carbon-silicon anode structure effectively alleviates silicon volume changes and prevents side reactions.
  • The developed SG/(Si/SG)n configuration offers practical utility for manufacturing high-energy-density LIBs.
  • This approach presents a viable strategy for advancing anode materials in LIB technology.