Injection-molded PEO/MXene nanocomposite for polymer-based solid-state electrolyte

The solid-state electrolyte constitutes a major component in an all-solid-state lithium-ion battery. It plays a critical role in determining the lifetime and performance of the battery. Among the materials used in polymer-based solid-state electrolytes, poly (ethylene oxide) (PEO) is widely studied...

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Bibliographic Details
Published in:	Composites communications Vol. 50; p. 102005
Main Authors:	Kim, Jae Yun, Ahn, Se Hyeon, Kim, Dong Gyun, Huang, Zheng Min, Song, Young Seok
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-10-2024
Subjects:	MXene Nanocomposite Poly(ethylene oxide) Solid electrolytes Nanocomposite Poly(ethylene oxide) Solid electrolytes MXene
Online Access:	Get full text
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Summary:	The solid-state electrolyte constitutes a major component in an all-solid-state lithium-ion battery. It plays a critical role in determining the lifetime and performance of the battery. Among the materials used in polymer-based solid-state electrolytes, poly (ethylene oxide) (PEO) is widely studied due to its high ionic conductivity and excellent solubility in lithium salts. However, the high crystallinity of PEO still remains a challenge to overcome, leading to poor ionic conductivity compared to other solid-state electrolytes. Herein, we fabricated MXene-embedded PEO nanocomposites for solid-state electrolytes using the injection molding process. MXenes were synthesized by using HF and MILD etching methods. The particle characteristics were evaluated through morphological, elemental, and structural analyses. In addition, the thermal, mechanical, and rheological properties of the solid electrolyte were examined. The solid-state electrolyte was injection-molded, and the flow and deformation of the molten polymer were modeled numerically. Also, the performance of the lithium-ion battery was simulated. The addition of MXene resulted in an approximately 80 times improvement of ionic conductivity, i.e., 1.0 ×10−4 S/cm. [Display omitted] •The polymer-based solid electrolytes were fabricated by a solvent-free method, injection molding process.•Ti3C2Tx MXene were synthesized using two different methods.•The PEO/LiTFSI/MXene solid-state electrolyte exhibits excellent flexibility, mechanical properties, and ionic conductivity.•The addition of MXene improved ionic conductivity by approximately 80 times, achieving a value of 1.0 ×10−4 S/cm.
ISSN:	2452-2139
DOI:	10.1016/j.coco.2024.102005