Porous perovskite calcium-manganese oxide microspheres as an efficient catalyst for rechargeable sodium-oxygen batteries

被引：92

作者：

Hu, Yuxiang ^{[1
]}

Han, Xiaopeng ^{[1
]}

Zhao, Qing ^{[1
]}

Du, Jing ^{[1
]}

Cheng, Fangyi ^{[1
]}

Chen, Jun ^{[1
]}

机构：

[1] Nankai Univ, Minist Educ, Collaborat Innovat Ctr Chem Sci & Engn, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 07期

关键词：

METAL-AIR BATTERIES; BIFUNCTIONAL ELECTROCATALYST; LITHIUM-O-2; BATTERIES; LI-O-2; REDUCTION; PERFORMANCE; NANOCOMPOSITES; ELECTROLYTES; NANOFLAKES; NANOSHEETS;

D O I：

10.1039/c4ta06287f

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：

We report herein the preparation of porous CaMnO3 microspheres and their electrochemical catalytic performance as a cathode for rechargeable sodium-oxygen (Na-O-2) batteries. In ether-based electrolytes, the CaMnO3/C cathode exhibits a high discharge capacity of 9560 mA h g(-1) at a current density of 100 mA g(-1), high rate capability (a capacity of 1940 mA h g(-1) at 1000 mA g(-1)), and considerable cyclability up to 80 cycles. Two discharged species of NaO2 and Na2O2 are detected at the discharged state. The remarkable electrocatalytic activity of CaMnO3 both for the oxygen reduction reaction (ORR) and for the oxygen evolution reaction (OER) is attributed to the porous micro-nanostructures in stable ether-based electrolytes.

引用

页码：3320 / 3324

页数：5

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