Phosphorous Pentasulfide as a Novel Additive for High‐Performance Lithium‐Sulfur Batteries
書誌事項
- 公開日
- 2012-06-14
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/adfm.201200696
- 公開者
- Wiley
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説明
<jats:title>Abstract</jats:title><jats:p>Lithium‐sulfur (Li‐S) batteries suffer from rapid capacity decay and low energy efficiency because of the low solubility of lithium sulfide (Li<jats:sub>2</jats:sub>S) in organic solvents and the intrinsic polysulfide shuttle phenomenon. Here, a novel additive, phosphorus pentasulfide (P<jats:sub>2</jats:sub>S<jats:sub>5</jats:sub>) in organic electrolyte, is reported to boost the cycling performance of Li‐S batteries. The function of the additive is two‐fold: 1) P<jats:sub>2</jats:sub>S<jats:sub>5</jats:sub> promotes the dissolution of Li<jats:sub>2</jats:sub>S and alleviates the loss of capacity caused by the precipitation of Li<jats:sub>2</jats:sub>S and 2) P<jats:sub>2</jats:sub>S<jats:sub>5</jats:sub> passivates the surface of lithium metal and therefore eliminates the polysulfide shuttle phenomenon. A Li‐S test cell demonstrates a high reversible capacity of 900–1350 mAh g<jats:sup>−1</jats:sup> and a high coulombic efficiency of ≥90% for at least 40 stable cycles at 0.1 C.</jats:p>
収録刊行物
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- Advanced Functional Materials
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Advanced Functional Materials 23 (8), 1064-1069, 2012-06-14
Wiley
