Related Experiment Video
Updated: May 28, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Facilely Constructing Li3P/Fe Dual-Conductive Interface for High-Performance Garnet-Based Solid-State Lithium Metal
Chuanlin Liu1, Sifei Min1, Wan Yuan1
1School of Physics and Materials Science, Nanchang University, Nanchang 330031, Jiangxi, China.
ACS Applied Materials & Interfaces
|May 26, 2026
Summary
Researchers developed a novel interface for solid-state lithium metal batteries using FeP coating on LLZTO. This Li3P/Fe layer enhances ionic conductivity, suppresses dendrites, and enables stable cycling for over 2200 hours.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- Garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is a promising solid-state electrolyte for lithium metal batteries.
- Poor interfacial contact and lithium dendrite growth limit LLZTO's practical application in solid-state lithium metal batteries (SSLMBs).
Purpose of the Study:
- To engineer a stable and conductive interface for LLZTO-based solid-state lithium metal batteries.
- To overcome interfacial resistance and dendrite formation issues in SSLMBs.
Main Methods:
- A solution-coating strategy was employed to deposit FeP on the LLZTO surface.
- An in situ reaction between molten lithium and FeP formed a Li3P/Fe composite interfacial layer.
- Electrochemical performance was evaluated using symmetric cells and LiFePO4 (LFP) cathode-based full cells.
Main Results:
- The Li3P/Fe interface exhibited mixed ionic and electronic conductivity, significantly reducing interfacial impedance.
- The modified interface effectively suppressed lithium dendrite nucleation and penetration.
- Symmetric cells demonstrated stable cycling for over 2200 hours at 0.1 mA cm-2.
- Full cells with an LFP cathode achieved 88.6% capacity retention after 100 cycles at 1 C.
Conclusions:
- The Li3P/Fe interface engineering strategy is highly effective for enhancing the performance and safety of SSLMBs.
- This approach offers a scalable solution for developing high-energy-density, long-lifespan solid-state batteries.
- The findings provide valuable insights for the industrialization of advanced solid-state battery technologies.
