New Insights into the Instability of Discharge Products in Na-O2 Batteries

被引：58

作者：

Landa-Medrano, Imanol ^{[1
]}

Pinedo, Ricardo ^{[2
]}

Bi, Xuanxuan ^{[3
,4
]}

Ruiz de Larramendi, Idoia ^{[1
]}

Lezama, Luis ^{[1
]}

Janek, Juergen ^{[2
]}

Amine, Khalil ^{[3
]}

Lu, Jun ^{[3
]}

Rojo, Teofilo ^{[1
,5
]}

机构：

[1] Univ Pais Vasco UPV EHU, Fac Ciencia & Tecnol, Dept Quim Inorgan, Bilbao 48080, Spain

[2] Univ Giessen, Inst Phys Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany

[3] Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA

[4] Ohio State Univ, Dept Chem & Biochem, 100 West 18th Ave, Columbus, OH 43210 USA

[5] CIC Energigune, Albert Einstein 48, Minano 01510, Alava, Spain

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 31期

关键词：

Na-O-2; batteries; discharge stability; SODIUM-OXYGEN BATTERIES; LI-O-2; BATTERIES; REDOX MEDIATOR; CELL CHEMISTRY; AIR BATTERIES; LITHIUM; NAO2; ELECTROLYTE; CATHODES;

D O I：

10.1021/acsami.6b06577

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sodium oxygen batteries currently stimulate extensive research due to their high theoretical energy density and improved operational stability when compared to lithium oxygen batteries. Cell stability, however, needs to be demonstrated also under resting conditions before future implementation of these batteries. In this work we analyze the effect of resting periods on the stability of the sodium superoxide (NaO2) discharge product. The instability of NaO2 in the cell environment is demonstrated leading to the evolution of oxygen during the resting period and the decrease of the cell efficiency. In addition, migration of the superoxide anion (O-2(-)) in the electrolyte is observed and demonstrated to be an important factor affecting Coulombic efficiency.

引用

页码：20120 / 20127

页数：8

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