Rational Design of Hybrid Electrolyte for All-Solid-State Lithium Battery Based on Investigation of Lithium-Ion Transport Mechanism

作     者：Park, Jinkyu Shim, Yoonsu Chang, Joon Ha Kim, Se-Hee Kang, Yongku Lee, Jin Woong Jung, Dae Soo Yuk, Jong Min Lee, Chan-Woo Suk, Jungdon 

作者机构：Advanced Energy Materials Research Center Advanced Materials Division Korea Research Institute of Chemical Technology 141 Gajeong-ro Yuseong-gu Daejeon34114 Korea Republic of Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology 291 Daehak-ro Yuseong-gu Daejeon34141 Korea Republic of Department of Advanced Materials University of Science and Technology 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of Energy Storage Materials Center Korea Institute of Ceramic Engineering and Technology Gyeongnam Jinju52851 Korea Republic of Computational Science & Engineering Laboratory Korea Institute of Energy Research 152 Gajeong-ro Yuseong-Gu Daejeon34129 Korea Republic of 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Ionic conductivity 

摘      要：Lithium all-solid-state batteries (ASSBs) are a promising technology for achieving high energy density, long cycle life, and safe rechargeable battery systems. Among these, Li ASSBs using solid polymer electrolytes (SPEs) have gained attention owing to their processability, lightweight nature, flexibility, and favorable electrode contacts. However, SPEs have low ionic conductivity, low Li+ transference number, and lack mechanical strength, limiting cell performance. Therefore, the present study focuses on the development of hybrid polymer electrolytes (HPEs) by incorporating Li1+xAlxTi2-x(PO4)3 (LATP) of Li/Na superionic conductor-type materials into SPEs. The HPEs with LATP 10 wt% exhibited significant improvements with an ionic conductivity of 7.23 × 10-4 S cm-1 at 45 ℃ and a Li+ transference number of 0.61. Density functional theory calculations supported the enhanced Li-ion migration through the polymer-LATP interface achieved by the optimized LATP content. The addition of LATP particles enhanced the mechanical strength of the electrolytes, effectively suppressing dendrite growth, resulting in a 65.42% capacity retention after 320 cycles, highlighting the crucial role of high-performance HPEs in advanced ASSBs. By addressing the limitations of SPEs, HPEs offer promising opportunities to unlock the full potential of solid-state battery technologies for various energy storage systems. © 2024, The Authors. All rights reserved.