Suppression of Polysulfide Dissolution and Shuttling with Glutamate Electrolyte for Lithium Sulfur Batteries

被引：91

作者：

Dong, Liwei ^{[1
,2
,3
]}

Liu, Jipeng ^{[1
,2
,3
]}

Chen, Dongjiang ^{[4
]}

Han, Yupei ^{[4
]}

Liang, Yifang ^{[1
,2
,3
]}

Yang, Mengqiu ^{[1
,2
,3
]}

Yang, Chunhui ^{[1
]}

He, Weidong ^{[4
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150080, Peoples R China

[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Peoples R China

[3] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150080, Peoples R China

[4] Univ Elect Sci & Technol China, Sch Phys, Chengdu 610054, Peoples R China

来源：

ACS NANO | 2019年 / 13卷 / 12期

关键词：

lithium sulfur batteries; electrolyte additive; polysulfide shuttling; charge repulsion; glutamate; LI-S BATTERIES; SEPARATOR; CATHODE;

D O I：

10.1021/acsnano.9b06934

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The lithium sulfur battery is regarded as a potential next-generation high-energy battery system. However, polysulfides dissolve and shuttle through the electrolytes, causing rapid capacity decay, serious selfdischarge, and poor high-temperature performances. Here, we demonstrate that by directly introducing glutamate into commercial electrolytes, these issues can be tackled simultaneously. With abundant negatively charged hydroxyl groups, the glutamate additive electrolyte effectively suppresses the shuttling of negatively charged polysulfide ions through strong repulsive interaction up to 1.54 eV. With glutamate additive electrolyte, the lithium sulfur battery has a capacity retention of 60% after 1000 cycles at 5.95 mA/cm2, a self-discharge rate on the order of one-third that of commercial electrolytes, and stable operation at 60 degrees C.

引用

页码：14172 / 14181

页数：10

共 48 条

[1] Modified Separator Performing Dual Physical/Chemical Roles to Inhibit Polysulfide Shuttle Resulting in Ultrastable Li-S Batteries [J].