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Updated: Aug 13, 2026
11:25
In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
A spontaneously evolving multifunctional interphase enables durable cycling in solid-state lithium metal batteries
Haijie Lin1, Xiang Xie1, Fenghua Zheng2
1Engineering Research Center of the Ministry of Education for Advanced Battery Materials, School of Metallurgy and Environment, Central South University Changsha 410083 P.R. China liangxh@csu.edu.cn minglei666@csu.edu.cn ouxing@csu.edu.cn.
Chemical Science
|August 12, 2026
Summary
A new PVDF coating with modified AlN on solid-state lithium battery electrolytes (LATP|Li) prevents interfacial degradation. This creates a stable interphase, enabling durable cycling in lithium-ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- NASICON-type Li1.3Al0.3Ti1.7(PO4)3 (LATP) is a promising solid electrolyte for solid-state lithium batteries.
- Direct contact between LATP and Li metal causes interfacial instability, including Ti4+ reduction and dendrite penetration.
Purpose of the Study:
- To develop a stable interface for LATP solid electrolytes by addressing the intrinsic instability at the LATP|Li interface.
- To enhance the electrochemical performance and cycling stability of solid-state lithium batteries.
Main Methods:
- A polyvinylidene fluoride (PVDF) coating loaded with modified aluminum nitride (AlN) was applied to the LATP|Li interface.
- PVDF defluorination formed an F-N bifunctional inorganic filler framework.
- In situ reaction with Li metal created a mosaic-structured interphase composed of LiF/Li x Al and Li3N/Li x Al microdomains.
Main Results:
- The novel interphase effectively blocked electron leakage, improved Li+ transport, and homogenized charge distribution.
- The modified interface demonstrated enhanced Li deposition and accommodated mechanical stress, preventing dendrite penetration.
- LFP full cells achieved 141.8 mA h g-1 after 800 cycles (96.62% retention at 0.5C); NCM811 full cells showed 82.14% retention after 150 cycles.
Conclusions:
- The F-N bifunctional mosaic interphase provides synergistic electrochemical and chemo-mechanical functions for stable solid-state battery operation.
- This study presents a design strategy for durable cooperative interphases, crucial for advancing solid-state battery technology.
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