What question did this study set out to answer?

To resolve polysulfide shuttling and sulfur loss in lithium–sulfur batteries by designing a stepwise electrocatalytic system that targets distinct stages of the sulfur redox reaction.

December 2, 2019ACS Nano

Stepwise Electrocatalysis as a Strategy against Polysulfide Shuttling in Li–S Batteries

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Authors

HYHualin YeZhejiang Academy of Forestry JSJianguo SunNational University of Singapore SZShengliang ZhangBrown University

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Implication

Experimental study demonstrates dual-catalyst stepwise electrocatalysis prevents polysulfide shuttling in lithium–sulfur batteries, suggesting high capacity under lean-electrolyte conditions.

Key Points

To resolve polysulfide shuttling and sulfur loss in lithium–sulfur batteries by designing a stepwise electrocatalytic system that targets distinct stages of the sulfur redox reaction.
Synthesized Fe–N and Co–N co-doped carbons to selectively catalyze long-chain (S8 ↔ Li2S4) and short-chain (Li2S4 ↔ Li2S) polysulfide conversions, respectively.
Configured the two electrocatalysts as a spatially separated dual layer within the sulfur cathode to achieve cooperative catalytic activity.
Utilized approximately 90% of the sulfur theoretical specific capacity in the dual-layer electrocatalyst cathode.
Achieved a high areal capacity of ~8.3 mAh cm–2 alongside a low electrolyte-to-sulfur ratio of 5 μL mg–1.

Cite This Study

Ye et al. (2019) studied this question.

synapsesocial.com/papers/6a92ea50803dec1397771ee5 https://doi.org/10.1021/acsnano.9b07121

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Implication

Experimental study demonstrates dual-catalyst stepwise electrocatalysis prevents polysulfide shuttling in lithium–sulfur batteries, suggesting high capacity under lean-electrolyte conditions.

Stepwise Electrocatalysis as a Strategy against Polysulfide Shuttling in Li–S Batteries

Discussion

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Implication

Key Points

Cite This Study

Stepwise Electrocatalysis as a Strategy against Polysulfide Shuttling in Li–S Batteries

Discussion

Member takes

Implication

Key Points

Cite This Study

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