Sparingly Solvating Electrolytes for High Energy Density Lithium-Sulfur Batteries

被引:193
作者
Cheng, Lei [1 ,2 ]
Curtiss, Larry A. [1 ,2 ]
Zavadil, Kevin R. [1 ,4 ]
Gewirth, Andrew A. [1 ,5 ]
Shao, Yuyan [1 ,6 ]
Gallagher, Kevin G. [1 ,3 ]
机构
[1] Argonne Natl Lab, Joint Ctr Energy Storage Res, Lemont, IL 60439 USA
[2] Argonne Natl Lab, Div Mat Sci, Lemont, IL 60439 USA
[3] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA
[4] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA
[5] Univ Illinois, Dept Chem, 600 South Mathews Ave, Urbana, IL 61801 USA
[6] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA
来源
ACS ENERGY LETTERS | 2016年 / 1卷 / 03期
关键词
IONIC LIQUID ELECTROLYTES; LI-S; SUPERCONCENTRATED ELECTROLYTES; POROUS-ELECTRODES; ANION RECEPTORS; DESIGN; CARBON; LI-O-2; PERFORMANCE; REVERSIBILITY;
D O I
10.1021/acsenergylett.6b00194
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Moving to lighter and less expensive battery chemistries compared to contemporary lithium-ion requires the control of energy storage mechanisms based on chemical transformations rather than intercalation. Lithium sulfur (Li/S) has tremendous theoretical specific energy, but contemporary approaches to control this solution-mediated, precipitation dissolution chemistry require large excesses of electrolyte to fully solubilize the polysulfide intermediates. Achieving reversible electrochemistry under lean electrolyte operation is the most promising path for Li/S to move beyond niche applications to potentially transformational performance. An emerging Li/S research area is the use of sparingly solvating electrolytes and the creation of design rules for discovering new electrolyte systems that fundamentally decouple electrolyte volume from sulfur and polysulfide reaction mechanism. This Perspective presents an outlook for sparingly solvating electrolytes as a key path forward for long-lived, high energy density Li/S batteries including an overview of this promising new concept and some strategies for accomplishing it.
引用
收藏
页码:503 / 509
页数:7
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