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Updated Metal Compounds (MOFs, ?S, ?OH, ?N, ?C) Used as Cathode Materials for Lithium–Sulfur Batteries
Advanced Energy Materials ( IF 27.8 ) Pub Date : 2018-01-15 , DOI: 10.1002/aenm.201702607
Jing Xu 1 , Tom Lawson 2 , Hongbo Fan 3 , Dawei Su 1 , Guoxiu Wang 1
Affiliation  

Lithium–sulfur (Li–S) batteries have the potential to be as efficient and as widespread as lithium‐ion (Li‐ion) batteries, since sulfur electrode has high theoretical capacity (1672 mA h gsul−1) and this element is affordable. However, unlike their ubiquitous lithium ion (Li‐ion) counterparts, it is difficult to realize the commercialization of Li‐S battery. Because the shuttle effect of polysulfide inevitably results in the serious capacity degradation. Tremendous progress is devoted to approach this problem from the aspect of physical confinement and chemisorption of polysulfide. Owing to weak intermolecular interactions, physical confinement strategy, however is not effective when the battery is cycled long‐term. Chemisorption of polysulfide that derived from polar–polar interaction, Lewis acid–base interaction, and sulfur‐chain catenation, are proven to significantly suppress the shuttle effect of polysulfide. It is also discovered that the metal compounds have strong chemical interactions with polysulfide. Therefore, this review focuses on latest metal–organic frameworks metal sulfides, metal hydroxides, metal nitrides, metal carbides, and discusses how the chemical interactions couple with the unique properties of these metal compounds to tackle the problem of polysulfide shuttle effect.

中文翻译:

更新的金属化合物(MOF 、? S 、? OH 、? N 、? C)用作锂硫电池的阴极材料

锂硫(Li–S)电池具有与锂离子(Li–ion)电池一样高效和广泛应用的潜力,因为硫电极具有很高的理论容量(1672 mA hg sul -1),并且此元素价格适中。但是,与普遍存在的锂离子电池不同,很难实现锂电池的商业化。由于多硫化物的穿梭效应不可避免地导致严重的容量降低。从物理限制和多硫化物的化学吸附方面致力于解决这一问题的巨大进展。由于分子间的相互作用较弱,因此物理限制策略在电池长期循环使用时无效。来自极性-极性相互作用,路易斯酸碱相互作用和硫链串联的多硫化物的化学吸附被证明可以显着抑制多硫化物的穿梭效应。还发现金属化合物与多硫化物具有强的化学相互作用。所以,
更新日期:2018-01-15
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