Operando Ambient Pressure X-ray Photoelectron Spectroscopy Studies of Sodium-Oxygen Redox Reactions

被引：20

作者：

Mao, Baohua ^{[1
,2
]}

Dai, Yang ^{[3
]}

Cai, Jun ^{[1
,2
]}

Li, Qingtian ^{[1
]}

Jiang, Chenggong ^{[1
]}

Li, Yimin ^{[1
,2
]}

Xie, Jingying ^{[4
]}

Liu, Zhi ^{[1
,2
]}

机构：

[1] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[3] Shanghai Univ, Sch Environm & Chem Engn, Dept Chem Engn, Shangda Rd 99, Shanghai 200444, Peoples R China

[4] Shanghai Inst Space Power Sources, State Key Lab Space Power Source Technol, Shanghai 200245, Peoples R China

来源：

TOPICS IN CATALYSIS | 2018年 / 61卷 / 20期

基金：

中国国家自然科学基金;

关键词：

All solid-state; Na-O-2; battery; Operando; APXPS; ENHANCED ELECTROCHEMICAL PERFORMANCE; GRAPHENE NANOSHEETS; AIR ELECTRODE; BATTERIES; LITHIUM; NAO2; OXIDATION; OXIDES;

D O I：

10.1007/s11244-018-1066-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Lower charge overpotential of sodium-oxygen (Na-O-2) batteries makes them a promising electrical storage technology. However, they have an undesirable discharge product, sodium carbonate (Na2CO3), which has widely been found in many previous studies. Whether and how the carbon components in the cathode are involved in the formation of Na2CO3 is still not well understood. Herein, an all solid-state Na-O-2 battery was constructed and its charge and discharge cycles were studied using ambient pressure X-ray photoelectron spectroscopy. The operando XPS results clearly demonstrate the formation of Na2CO3 on the cathode during the discharge cycle. A fraction of the carbonate formed can be cycled while charging the battery. Transformation of the carbon-based cathode to Na2CO3 is a potential cause of capacity fading of the Na-O-2 battery.

引用

页码：2123 / 2128

页数：6

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