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Journal of Colloid and Interface Science

Journal of Colloid and Interface Science

IF: 9.4
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The multi-scale dissipation mechanism of composite solid electrolyte based on nanofiber elastomer for all-solid-state lithium metal batteries

Published:7 December 2024 DOI: 10.1016/j.jcis.2024.12.042 PMID: 39662233
Wen Yu,?Hengying Xiang,?Jianing Yue,?Xiaofan Feng,?Wenwen Duan,?Yang Feng,?Bowen Cheng,?Nanping Deng,?Weimin Kang

Abstract

Developing next generation batteries necessitates a paradigm shift in the way to engineering solutions for materials challenges. In comparison to traditional organic liquid batteries, all-solid-state batteries exhibit some significant advantages such as high safety and energy density, yet solid electrolytes face challenges in responding dimensional changes of electrodes driven by mass transport. Herein, the critical mechanical parameters affecting battery cycling duration are evaluated based on Spearman rank correlation coefficient, decoupling them into strength, ductility, stiffness, toughness, elasticity, etc. Inspired by the statistical results to apply the materials with stress-relief mechanisms, we propose an elastic solid electrolyte based on the multi-scale mechanical dissipation mechanism. The Li6.4La3Zr1.4Ta0.6O12/thermoplastic polyurethanes curled fibrous framework is designed and prepared by side-by-side electrospinning technique, serving as elastic source and ion-transport pathways for the composite with poly(ethylene oxide) matrix. Dominated sequentially by electrolyte deformation, network orientation, extendable fibers and molecular chain unfolding, the prepared elastic electrolyte exhibits excellent resilience, compression and puncture resistance. Meanwhile, the curled fast ion conductor fibers can also provide the transport pathways along the component of transmembrane direction, endowing the composite electrolyte with an ionic conductivity of 1.46?×?10-4?S?cm-1 at 30?°C. A low capacity decay of 0.011?% per cycle at 2 C in assembled LiFePO4/Li battery and an excellent lifespan of 1000 cycles at 50?°C in LiNi0.8Mn0.1Co0.1O2/Li battery can be achieved. The elastic electrolyte system presents a promising strategy for enabling stable operation of high-energy all-solid-state lithium batteries.

Substances (2)

Materials
Procduct Name CAS Molecular Formula Supplier Price
N,N-Dimethylformamide 68-12-2 C3H7NO 1215 suppliers $11.20-$12200.00
Acetonitrile 75-05-8 C2H3N 1022 suppliers $61180.00

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