Xueao Jiang , Zhaoen Liu , Weijian Liu , Da Yu , Jun Zhang , Xiwen Wang , Yan Zhang , Shiguo Zhang
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引用次数: 0
Abstract
Ionic liquid (IL)-based gel electrolytes (ionogels) show great potential as quasi-solid-state electrolytes (QSSEs) for lithium-ion batteries (LIBs). However, conventional ionogels face challenges involving complex gelation processes, high gelator content (usually greater than 20 wt %), lower conductivity than neat ILs, and low Li+ transference numbers. Here, we create novel lithium salt-containing supramolecular ionogels (SIGs) as efficient QSSEs for LIBs through a simple and environmentally friendly approach. By using a low-molecular-weight gelator, specifically 12-hydroxyoctadecanoic acid, lithium-containing IL electrolytes can be solidified at a gelator concentration of only 2 wt %. The resulting physical ionogels exhibit remarkable characteristics, including high ionic conductivity similar to neat ILs and improved electrochemical stability. In addition, these SIGs demonstrate a distinctive thermally reversible gel-to-sol transition, a quality not attainable in other QSSEs. This feature promotes better electrode/electrolyte contact, enabling excellent battery performance using LiFePO4, LiNi0.8Co0.1Mn0.1O2, and LiCoO2 cathodes, along with Li metal and Li4Ti5O12 anodes.
期刊介绍:
Matter, a monthly journal affiliated with Cell, spans the broad field of materials science from nano to macro levels,covering fundamentals to applications. Embracing groundbreaking technologies,it includes full-length research articles,reviews, perspectives,previews, opinions, personnel stories, and general editorial content.
Matter aims to be the primary resource for researchers in academia and industry, inspiring the next generation of materials scientists.