材料科学
电解质
层状结构
复合数
离子电导率
电池(电)
离子液体
结晶度
锂(药物)
电化学
电化学窗口
化学工程
快离子导体
复合材料
电极
物理化学
有机化学
量子力学
医学
功率(物理)
化学
物理
工程类
内分泌学
催化作用
作者
Yafang Zhang,Jiajia Huang,Huan Liu,Weijie Kou,Yan Dai,Wei Dang,Wenjia Wu,Jingtao Wang,Yongzhu Fu,Zhongyi Jiang
标识
DOI:10.1002/aenm.202300156
摘要
Abstract Electrolytes that can work over a wide temperature range are crucial forsustainable advanced energy systems. Here, a kind of lamellar ionic liquid composite electrolyte (L‐ILCE) is explored through confining ionic liquids (ILs) in ordered interlayer nanochannels of 2D vermiculite framework. It is demonstrated that, within nanochannels, the finely tuned microstructure can induce the rearrangement and crystallinity of ILs, affording L‐ILCE the combined superiorities of liquid electrolyte and solid‐state electrolyte. L‐ILCE exhibits high ionic conductivities (0.09–1.35 × 10 −3 S cm −1 at −40 to 100 °C), whereas polymer and inorganic electrolytes usually lose ionic conduction ability below 0 °C. Additionally, L‐ILCE exhibits high transference number (0.89, comparable with single‐ion conductors) and wide electrochemical window (0–5.3 V). LiFePO 4 ||Li and high‐voltage LiNi 0.8 Mn 0.1 Co 0.1 O 2 ||Li cells assembled from L‐ILCEs exhibit highly stable electrochemical performance in −20 to 60 °C. Furthermore, pouch cells (0.1 Ah) exhibit high capacity of 93.8 and 45.0 mAh after 50 cycles along with capacity retention of 97% and 98% at 60 and −20 °C, respectively, as well as excellent flexibility and safety. This study offers promise in the rational design of advanced ion conductors for lithium‐based batteries with wider operating temperatures.
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