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Updated: Apr 13, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Ionic Environment Dielectric Modulation Design of Composite Solid-State Electrolyte for High-Voltage Lithium-Metal
Yanling Zhang1, Chao Wang2,3, Yang Li1
1Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.
None:
Composite solid-state polymer electrolytes (CPEs) have become a key driving force for the industrialization of solid-state batteries (SSBs) by virtue of their excellent flexibility and processability. Nevertheless, the ionic conduction relaxation of the polymer chain segments leads to localized ion stacking, non-steady state mass transfer, and concentration polarization issues, limiting the further application of CPEs. Herein, a heterogeneous surface is used to modulate the ionic environment of the dispersed phase in CPEs by incorporating high dielectric material BaTiO3 and Li6.4La3Zr1.4Ta0.6O12 (LLZTO) into a flexible crosslinked polyester matrix. The built-in electric field of the BaTiO3/LLZTO heterojunctions guides the dissociation and directional diffusion of Li+, which achieves ionic conductivity of 2.01 × 10-4 S cm-1 and Li+ transference number of 0.62 at 25 °C. Simultaneously, the enhanced interfacial dynamics and optimized Li+ percolation at the Li/electrolyte interface mitigate dendritic propagation, enabling ultra-stable lithium plating/stripping behavior over 2800 h at 0.1 mA cm-2. Li/LiNi0.8Co0.1Mn0.1O2 (NCM811) full cell demonstrates 81.79% capacity retention after 200 cycles of 4.5 V cut-off voltage at 0.5C. This work presents a new strategy for material design and interface engineering that aims at achieving high safety and high energy density in SSBs.
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