Stabilizing Effect of Polysulfides on Lithium Metal Anodes in Sparingly Solvating Solvents

被引：13

作者：

Reuter, Florian S. ^{[1
,2
]}

Huang, Chen-Jui ^{[3
]}

Hsieh, Yi-Chen ^{[4
]}

Doerfler, Susanne ^{[2
]}

Brunklaus, Gunther ^{[4
]}

Althues, Holger ^{[2
]}

Winter, Martin ^{[4
,5
]}

Lin, Shawn D. ^{[3
]}

Hwang, Bing-Joe ^{[3
,6
]}

Kaskel, Stefan ^{[1
,2
]}

机构：

[1] Tech Univ Dresden, Dept Inorgan Chem, Bergstr 66, D-01062 Dresden, Germany

[2] Fraunhofer Inst Mat & Beam Technol IWS, Fraunhofer IWS, Business Unit Chem Surface Technol, Winterbergstr 28, D-01277 Dresden, Germany

[3] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 10607, Taiwan

[4] Forschungszentrum Julich, Ion Energy Storage IEK 12, Helmholtz Inst Munster, Corrensstr 46, D-48149 Munster, Germany

[5] Univ Munster, Inst Phys Chem, MEET Battery Res Ctr, Corrensstr 46, D-48149 Munster, Germany

[6] Natl Synchrotron Radiat Res Ctr NSRRC, Hsinchu 30076, Taiwan

来源：

BATTERIES & SUPERCAPS | 2021年 / 4卷 / 02期

关键词：

electrochemistry; interface; lithium; lithium-sulfur battery; operando analytics; LI-S BATTERY; SOLID-ELECTROLYTE INTERPHASE; HIGH-ENERGY DENSITY; SULFUR BATTERIES; LIQUID ELECTROLYTE; FLUORINATED ETHER; PERFORMANCE; SHUTTLE; DISCHARGE; MECHANISM;

D O I：

10.1002/batt.202000190

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrolytes with sparingly polysulfide solubility such as 1.5 M LiTFSI in tetramethylene sulfone (TMS) and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) are beneficial for the cycle stability of Li-S pouch cells. In this work, this specific electrolyte system and the role of dissolved polysulfides (PS) in symmetrical Li/Li cells is investigated. By studying varying TMS/TTE volume ratios and polysulfide addition aided by both ex situ and operando spectroscopic as well as microscopic techniques, the positive impact of PS on the lithium plating/stripping behavior is evaluated. The composition of the solid-electrolyte interphase (SEI) as well as the microscopic morphology differs for electrolytes with PS from those without PS addition. These findings are crucial for the development of electrolytes for cycle-stable Li-S prototype cells.

引用

页码：347 / 358

页数：12

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