Se-doped carbon as highly stable cathode material for high energy nonaqueous Li-O2 batteries

被引：23

作者：

Qian, Zhengyi ^{[1
,3
]}

Guo, Rui ^{[2
]}

Ma, Yulin ^{[1
,3
]}

Li, Changjin ^{[1
,3
]}

Du, Lei ^{[1
,3
]}

Wang, Yang ^{[1
,3
]}

Du, Chunyu ^{[1
,3
]}

Huo, Hua ^{[1
,3
]}

Yin, Geping ^{[1
,3
]}

机构：

[1] Harbin Inst Technol, Inst Adv Chem Power Sources, Sch Chem & Chem Engn, Harbin 150001, Peoples R China

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

[3] Harbin Inst Technol, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 214卷

基金：

中国国家自然科学基金;

关键词：

Li-O-2; battery; Se-doped carbon; Discharge; Stability; PERFORMANCE; REDUCTION; NITROGEN; NANOTUBES; ELECTRODE; CATALYST;

D O I：

10.1016/j.ces.2019.115413

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Hetero-doped carbon materials have been generally applied as the cathode materials for Li-O-2 batteries due to the improved catalytic activity. However, they commonly suffer from performance fading because of carbon corrosion under harsh oxidative environments in Li-O-2 batteries. Herein, an elegant cathode material for Li-O-2 batteries is developed through doping Se in carbon. The results show that the Se-doped carbon cathode reveals 53% higher discharge capacity, decreased overpotential and superior rate capability. Structure evolution analysis and density functional theory calculation reveal that the products mainly grow via solution driven mechanism, which can better sustain discharge. Se-doped carbon cathode also presents high stability due to its prominent antioxidant ability, efficiently suppressing the side reaction and cathode passivation. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：7

共 34 条

[1] New scale factors for harmonic vibrational frequencies using the B3LYP density functional method with the triple-ξ basis set 6-311+G(d,p) [J].