Pseudo-trilayer Organoclay Enables Directed Li⁺ Transport and Anion Trapping in Quasi-Solid-State Gel Electrolytes.

Authors

Young Gyun Choi, Jongkyoung Kim, Chanui Park, Jin Il Jang, Sangdeok Kim, Hyoseok Kim, Hyung Min Kim, Won Bo Lee, Seungho Cho, Jong Hyeok Park

Published in

ACS nano. Sep 17, 2025. Epub Sep 17, 2025.

Abstract

Enhancing Li⁺ transport while ensuring safety is crucial for the development of high-energy density batteries. While nanomaterials boost ionic conductivity in quasi-solid state gel electrolyte (QSE), the transport mechanisms remain unclear. This study presents a synthetic strategy utilizing tailored two-dimensional saponite clay additives with a controlled organic cation configuration to achieve superior Li-ion conductivity in QSE. This optimized configuration enables rapid, uniform Li⁺ movement through controlled interlayers and effective anion trapping within aligned surfactant domains. Consequently, a pseudo-trilayer configuration of organoclay serves as a fast Li⁺ transport pathway in the QSE, leading to a high Li⁺ transference number of 0.71 and stable cycling performance for 1000 h. Moreover, batteries utilizing the pseudo-trilayer organoclay demonstrate compatibility with the LiNi_0.9Mn_0.05Co_0.05O₂ cathode, maintaining 86.7% capacity retention after 200 cycles. This work suggests a design strategy for advanced QSE that precisely controls the Li⁺ transport route, contributing to a high energy density with minimal additives.

PMID:
40961290
Bibliographic data and abstract were imported from PubMed on 18 Sep 2025.

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