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Updated: Jun 9, 2026
09:36
In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
Published on: September 12, 2018
Ion-Electron Coupling Strategy Induced by Interface Electric Field Enables High-Performance LiFePO4 From Spent
Ji Shen1,2, Miaomiao Zhou1, Zhuozhao Wu2
1School of Chemical & Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, China.
Angewandte Chemie (International Ed. in English)
|June 7, 2026
Summary
Researchers developed an ion-electron coupling strategy to regenerate spent lithium iron phosphate (LFP) batteries. This method overcomes transport barriers, enhancing LFP cathode performance and enabling efficient battery recycling.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Direct regeneration of spent lithium iron phosphate (LFP) cathodes is hindered by high energy barriers for simultaneous lithium-ion (Li+) and electron transport.
- Existing methods have not systematically addressed these coupled transport limitations in LFP regeneration.
Purpose of the Study:
- To propose and validate a novel ion-electron coupling (IEC) strategy for the direct regeneration of spent LFP.
- To overcome the inherent transport barriers in LFP regeneration through coordinated Li+ and electron flow.
Main Methods:
- Development of localized boron-carbon (B-C) dipoles on the LFP surface to create a work function (WF) gradient.
- Utilizing the resulting interfacial electric field (IEF) to drive spontaneous electron flow and establish efficient Li+ transport pathways.
- Characterization of the regenerated LFP's electrochemical performance and stability.
Main Results:
- The IEC strategy, driven by IEF, successfully lowered energy barriers for both Li+ and electron transport.
- Regenerated LFP exhibited excellent rate capacity (111.4 mAh g-1 at 10 C) and long-term stability (86.6% retention after 1000 cycles at 1 C).
- The IEF was maintained in the regenerated LFP, ensuring sustained rapid charge carrier transport.
Conclusions:
- The proposed IEC strategy provides a novel and universal approach for upgrading spent LFP cathodes.
- This method effectively addresses the limitations of direct LFP regeneration, paving the way for improved battery recycling.
- The findings offer a significant advancement in the field of lithium-ion battery materials and sustainable energy storage.
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