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使用超热水有效地矿化二 ((pentafluoroethanesulfonyl) imide 和相关的电解质化物

Hisao Hori¹, Keisuke Okamura¹, Kaito Suzuki¹

¹Faculty of Science, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.

|May 27, 2024

概括

在过热水中处理二氧化 (pentafluoroethanesulfonyl) 胺的废物是高酸有效的. 这种方法实现了,硫和的完全矿化,避免了CHF3.3等有害副产品.

科学领域:

电化学电化学电化学
环境化学环境化学
材料科学材料科学材料科学

背景情况:

二 (pentafluoroethanesulfonyl) 胺 (LiPFSI) 是一种用于先进电池电解质的化物.
有效的废物处理方法对于处理已耗尽的电池组件至关重要.
过热水处理因其降解持久有机污染物的潜力而受到探索.

研究的目的:

调查使用超热水处理Li[N(SO2C2F5) 2的废物处理.
为了评估 permanganate (KMnO4) 在 Li[N] (SO2C2F5) 2 组件的矿化中的有效性.
评估拟议处理方法对环境的影响和副产品.

主要方法:

在300°C的纯热水中,Li[N(SO2C2F5) 2的反应.
在超热水中用甲 (KMnO4) 处理Li[N(SO2C2F5) 2 .
对化物 (F-),硫酸盐 (SO4^2-),酸盐 (NO3^-),化物 (NO2^-) 和气态副产品 (CO2,CHF3) 的分析.

主要成果:

纯超热水处理产生了最小的化物离子.
在18小时内用158mMKMnO4处理时,F,S和N原子的矿化率高于99%.
对于类似物K[N(SO2C4F9) 2和K[N(SO2CF2) 2CF2],也实现了完全矿化.
没有检测到像CHF3这样的高全球变暖潜力气体;只观察到微量CO2.

结论:

过热水中的甲是一种高度有效的方法,可以完全矿化Li[N[(SO2C2F5) 2和相关化合物.
这种方法为化电池电解质盐的环保处置提供了一个有希望的解决方案.
该方法避免了有害温室气体的形成,有助于可持续的电池循环利用.

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