使活性超氧化物失活使电池恢复活力的抗氧化剂分类。

IF 6.6 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ChemSusChem Pub Date : 2024-12-08 DOI:10.1002/cssc.202401302
Jeongin Lee, Jonghak Kim, Chihyun Hwang, Hyun-Kon Song
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引用次数: 0

摘要

在采用氧电化学作为阴极过程的锂电池中,超氧自由基被认为是一种反应性亲核试剂,它会分解电解质,从而降低电池的耐久性。在本文中,我们对电池中用于灭活活性超氧化物的抗氧化剂的工作机制进行了明确的了解和分类,并将其分为三类。自由基清除剂作为第一组,被牺牲以提供部分来中和超氧化物的自由基活性。可逆性超氧化物歧化酶模拟物(SODm's)与自由基清除剂的区别在于其催化转化,根据抗衰老机制分为两个家族:电子介导SODm (e-SODm)和化学催化SODm (c-SODm)。氧化活性e-SODm家族,作为第二组,介导一个电子从一个超氧自由基到另一个超氧自由基,分别驱动氧化为双氧和还原为过氧化物。c-SODm家族作为第三基团,化学催化超氧化物歧化反应,降低相同自由基之间歧化的活化能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Taxonomy of Antioxidants to Deactivate Reactive Superoxide for Rejuvenating Batteries

Taxonomy of Antioxidants to Deactivate Reactive Superoxide for Rejuvenating Batteries

Taxonomy of Antioxidants to Deactivate Reactive Superoxide for Rejuvenating Batteries

Taxonomy of Antioxidants to Deactivate Reactive Superoxide for Rejuvenating Batteries

In lithium batteries employing oxygen electrochemistry as their cathodic process, superoxide radical is recognized as a reactive nucleophile that decomposes electrolytes and therefore deteriorates battery durability. Herein, we categorized the antioxidants employed for deactivating reactive superoxide in batteries into three groups after their working mechanisms were clearly understood and classified. Radical scavengers, as the first group, are sacrificed to provide moieties to neutralize the radical activity of superoxide. The reversible superoxide dismutase mimics (SODm's), distinguished from radical scavengers by their catalytic turnover, were divided into two families in terms of the anti-aging mechanism: electron-mediating SODm (e-SODm) and chemo-catalytic SODm (c-SODm). The redox-active e-SODm family, as the second group, mediates an electron from a superoxide radical to another superoxide, driving oxidation to dioxygen and reduction to peroxide, respectively. The c-SODm family, as the third group, chemically catalyzes superoxide disproportionation reaction, lowering the activation energy of the dismutation between the same radicals.

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来源期刊
ChemSusChem
ChemSusChem 化学-化学综合
CiteScore
15.80
自引率
4.80%
发文量
555
审稿时长
1.8 months
期刊介绍: ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology
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