Synergistic design of a interface-enhanced composite solid electrolyte through in-situ polymerization within a tri-layer ceramic framework for solid-state Li-metal batteries
Year: 2026
Type: article
Abstract: The solid-state electrolyte (SSE) has promising applications for next-generation high-energy-density and safe solid-state Li-metal batteries (SSLMBs). However, the significant challenge of achieving both high ionic conductivity and good compatibility with electrodes has limited the development of high-performance CSEs for SSLMBs. To overcome these challenges, an unique in situ composite solid electrolytes (CSEs) was fabricated. In brief, employing a tape-casting method to preparate a tri-layer porous-dense-porous ceramic films with nano-sized Li₆.₄La₃Zr₁.₄Ta₀.₆O₁₂ (LLZTO). Subsequently, the vinylene ethylene carbonate (VEC)-based small-molecule polymer monomers are injected into the tri-layer ceramic framework for in-situ polymerization to produce the CSE. Blocking cell tests demonstrated that the CSE has an excellent ionic conductivity of 0.933 mS·cm⁻¹. The Li|CSE|Li symmetric cells exhibited a high Li⁺ transference number of 0.565 and the Li|CSE|SS asymmetric cells behaved an electrochemical stability window of 5.17 V. All of which due to the multifunctional synergistic effect of the tri-layer LLZTO ceramic fillers with the polymer electrolyte. The Li|CSE|LiFePO₄ cell showed a high reversible specific capacity of 146.2 mAh·g⁻¹ with a capacity retention of 91 % after 150 cycles at 30 °C and 0.5 C. The Graphite|CSE|LiFePO₄ full cells delivered an initial discharge capacity of 142.1 mAh·g⁻¹ at 0.5 C with a capacity retention of 83.1 % after 100 cycles.
Source: Journal of Alloys and Compounds
Institution: Jiangxi University of Science and Technology
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,660
Awards: G1031180020, G1529475505, G1716787480
OpenAlex ID: W7127043133