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Updated: Jun 4, 2025
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
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Iron as a Sulfidation-Resistant Current Collector for Negative Electrode in Sulfide-Based All-Solid-Batteries
Hyejun Kim1, Hyojoo Lee1, Gyeong Hyeon Kwon1
1School of Advanced Materials Science and Engineering, Sungkyunkwan University, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 2066, Republic of Korea.
Small (Weinheim an Der Bergstrasse, Germany)
|December 23, 2024
Summary
Iron (Fe) is a superior current collector for all-solid-state batteries (ASSBs) with Li6PS5Cl electrolytes compared to copper (Cu). Fe enhances interface stability and enables over 1000 cycles for graphite electrodes.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- All-solid-state batteries (ASSBs) are gaining traction, with Li6PS5Cl argyrodite (LPSCl) being a promising electrolyte.
- Traditional copper (Cu) current collectors show instability with LPSCl electrolytes in ASSBs.
Purpose of the Study:
- To investigate iron (Fe) as an alternative current collector for LPSCl-ASSBs.
- To compare the electrochemical performance and stability of Fe versus Cu current collectors.
Main Methods:
- Electrochemical analysis to study interface reactions and corrosion.
- Density Functional Theory (DFT) calculations for stability assessment.
- X-ray Diffraction (XRD) and linear thermammetry for thermal stability analysis.
Main Results:
- Copper (Cu) reacts with LPSCl, forming sulfides and causing pitting corrosion.
- Iron (Fe) exhibits a stable native oxide layer, preventing sulfide side reactions and enhancing interface stability.
- Fe demonstrates superior electrochemical and thermal stability with LPSCl compared to Cu.
- Fe current collectors enable over 1000 cycles for graphite electrodes in ASSBs.
Conclusions:
- Iron (Fe) is a promising, stable current collector for Li6PS5Cl-based ASSBs.
- Understanding metal-electrolyte interactions is crucial for advancing ASSB performance.
- Fe replacement of Cu significantly boosts the cycleability of ASSBs.
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