Precipitation–Microstructure Interactions in the Li-Sulfur Battery Electrode,The Journal of Physical Chemistry C

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Precipitation–Microstructure Interactions in the Li-Sulfur Battery Electrode
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acs.jpcc.7b09997
Aashutosh Mistry ₁ , Partha P. Mukherjee ₁

Affiliation

Formation and precipitation of insulating discharge products, such as Li₂S, in the lithium–sulfur (Li–S) battery cathode, leads to deleterious performance decay. Physicochemical interactions underlying the cathode microstructure evolution due to precipitation are hitherto poorly understood. In this work, a mesoscale understanding of the microstructure–precipitate interplay owing to surface passivation and pore blockage is presented. Mesoporous, carbon-based cathode microstructures are examined for disparate precipitate morphology and growth. The pore-scale manifestation of the microstructural and transport limitations on the electrochemical performance is elucidated. Surface passivation and pore blockage effects are examined for complexations due to sulfur loading, electrolyte volume, pore size, and precipitate morphology. This study provides critical insights into the underlying mesoscale physics and microstructural stochasticity on the Li–S battery performance.

中文翻译：

锂硫电池电极中的沉淀-微结构相互作用

绝缘放电产物（例如Li _2）的形成和沉淀锂-硫（Li-S）电池阴极中的S会导致性能下降。迄今为止，对由于沉淀引起的阴极微结构演变的物理化学相互作用的了解还很少。在这项工作中，由于表面钝化和孔堵塞，对微观结构-沉淀物相互作用产生了中尺度的理解。检查了介孔碳基阴极微结构的不同沉淀物形态和生长。阐明了电化学性能的微观结构和运输限制的孔尺度表现。检查表面钝化和孔堵塞效应是否由于硫负载，电解质体积，孔径和沉淀物形态而形成络合物。

更新日期：2017-11-20

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