Sigma-Aldrich Lithium bis(fluorosulfonyl)imide，99.9%微量金属，电池级

产品概述

电池级锂离子电池氟磺酰亚胺（LiFSI）是一种白色粉末状锂盐，常用作锂离子电池高性能电解质中的锂源。LiFSI可溶于水和许多有机物，包括通常用于液体电解质的碳酸酯和醚，如碳酸亚乙酯或碳酸二甲酯。我们的电池级LiFSI具有高纯度，钠，钾，氯化物和硫酸盐，以及低水分含量。

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应用领域

Battery grade LiFSI is used as the source of lithium ions in battery electrolytes for LiBs. In comparison to LiPF₆, LiFSI has marked advantages including a higher ionic conductivity in organic solvents and improved thermal stability. In addition, LiFSI has advantages in better stability against hydrolysis, lower aluminum corrosion with stability up to 4.7 V, higher transference number, and generally higher columbic efficiency for Li metal anode cycling.[3] Because of these advantages, many of the groundbreaking works to improve electrolytes use LiFSI. For example, researchers leveraged the improved solubility of LiFSI in ethers compared to LiTFSI or LiPF₆ to formulate a LiFSI-based electrolyte that operates even at ultra-low temperatures like -30 °C, demonstrate cathodic stability up to 6 V vs Li/Li⁺, and achieve fast cycling with high columbic efficiency LiFSi is also commonly used as a co-salt with LiPF₆ to improve the performance at high operating temperatures, for example 0.6 M LiFSI and 0.6 M LiPF₆ in carbonate blends Researchers also often use LiFSI or a blend of LiFSI and LiTFSI as the source of lithium ions in polymer electrolytes, especially with Li metal anodes. LiFSI is shown to produce a LiF-rich solid-electrolyte interphase on Li metal surfaces, which promotes cycling with high coulombic efficiencies

技术规格