Phosphorous Pentasulfide as a Novel Additive for High-Performance Lithium-Sulfur Batteries

被引：411

作者：

Lin, Zhan ^{[1
]}

Liu, Zengcai ^{[2
]}

Fu, Wujun ^{[2
]}

Dudney, Nancy J. ^{[1
]}

Liang, Chengdu ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2013年 / 23卷 / 08期

关键词：

lithium-sulfur batteries; cathode materials; electrochemistry; polysulfide shuttle; passivation layer; SECONDARY BATTERIES; CRYSTAL-STRUCTURE; GLASSY MATERIALS; IONIC CONDUCTOR; LI-BATTERIES; CATHODE; COMPOSITES; ENERGY; SYSTEM;

D O I：

10.1002/adfm.201200696

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lithium-sulfur (Li-S) batteries suffer from rapid capacity decay and low energy efficiency because of the low solubility of lithium sulfide (Li2S) in organic solvents and the intrinsic polysulfide shuttle phenomenon. Here, a novel additive, phosphorus pentasulfide (P2S5) in organic electrolyte, is reported to boost the cycling performance of Li-S batteries. The function of the additive is two-fold: 1) P2S5 promotes the dissolution of Li2S and alleviates the loss of capacity caused by the precipitation of Li2S and 2) P2S5 passivates the surface of lithium metal and therefore eliminates the polysulfide shuttle phenomenon. A Li-S test cell demonstrates a high reversible capacity of 9001350 mAh g1 and a high coulombic efficiency of 90% for at least 40 stable cycles at 0.1 C.

引用

页码：1064 / 1069

页数：6

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