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Updated: Jun 12, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Y³⁺/Zn²⁺ Codoped LATP/PVDF-HFP Coating Enables Bulk-Interface Regulation for Stable Lithium Metal Batteries.

Qiyuan Zhu¹, Yuhang Yang¹, Jiling Song²

¹College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.

ACS Applied Materials & Interfaces

|June 11, 2026

Summary

A novel composite coating for lithium metal battery separators suppresses lithium dendrites and improves high-voltage compatibility. This Y3+/Zn2+ codoped LATP/PVDF-HFP coating enables stable cycling and high capacity retention for advanced energy storage.

Keywords:

bulk–interface regulation composite separator interface stability lithium dendrite suppression lithium metal batteries polypropylene separators

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Developing stable and long-lasting lithium metal batteries (LMBs) requires separators that prevent lithium dendrite growth and tolerate high-voltage cathodes.
Existing separators often struggle to meet both requirements, limiting the cycle life and performance of LMBs.

Purpose of the Study:

To engineer a functional separator coating that simultaneously suppresses lithium dendrite formation and ensures compatibility with high-voltage cathodes in LMBs.
To investigate a synergistic bulk-interface regulation strategy for enhanced separator performance.

Main Methods:

A Y3+/Zn2+ codoped Li1.3Al0.275Y0.025Ti1.7(PO4)3 (LAYTP-Zn) material was synthesized via a solid-state route.
The LAYTP-Zn was integrated with PVDF-HFP to create a coatable composite.
This composite coating was applied to a commercial polypropylene (PP) separator, creating a synergistic bulk-interface regulation system.

Main Results:

The Y3+/Zn2+ incorporation broadened bulk Li+ transport pathways and enhanced interfacial chemistry, increasing the Li+ transference number to 0.79.
The composite coating promoted uniform Li+ flux and the formation of a stable, LiF-enriched interphase, effectively suppressing dendrite growth.
Li||Li symmetric cells showed stable cycling over 3000 hours, and Li||LFP and Li||NCM811 half-cells demonstrated excellent capacity retention at high voltages (up to 4.73 V).

Conclusions:

The Y3+/Zn2+ codoped LATP/PVDF-HFP composite coating provides a scalable and effective strategy for enhancing separator performance in lithium metal batteries.
This approach integrates bulk ion transport optimization with interfacial regulation, paving the way for high-performance, long-cycle-life LMBs.