Freestanding MnO2@carbon papers air electrodes for rechargeable Li-O2 batteries

被引：51

作者：

Zhang, Leilei ^{[1
,2
]}

Zhang, Feifei ^{[1
,2
]}

Huang, Gang ^{[1
,2
]}

Wang, Jianwei ^{[1
,2
]}

Du, Xinchuan ^{[1
,2
]}

Qin, Ling ^{[1
,2
]}

Wang, Limin ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Changzhou Inst Energy Storage Mat & Devices, Changzhou 213000, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2014年 / 261卷

基金：

中国国家自然科学基金;

关键词：

Freestanding electrode; MnO2; nanosheets; Li-O-2; battery; In situ synthesis; EFFICIENT BIFUNCTIONAL CATALYST; LITHIUM-OXYGEN BATTERY; MANGANESE OXIDE; CATHODES; DEPOSITION; STABILITY; NANOTUBES; PRODUCTS;

D O I：

10.1016/j.jpowsour.2014.03.094

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 have designed the air electrode for rechargeable Li-O-2 batteries by adapting conventional current collectors-carbon papers (CPs), as freestanding substrates. The MnO2@CP electrodes are prepared by simply floating CPs on KMnO4 solution at room temperature. CPs act as the reducing agents as well as the freestanding substrates. Birnessite-type MnO2 nanosheets are observed to in situ grow vertically from the surface of CPs, thus building 3D porous architecture. The nanosheets are uniformly distributed and interconnected each other, which contributes to an improved electrical connection among the MnO2 catalyst and CPs. The cycling tests using the electrode as the cathode in rechargeable Li-O-2 batteries exhibit high reversibility and superior cycling stability, over 90 cycles with a capacity of more than 1000 mA h (g MnO2)(-1) and a high coulombic efficiency of around 100% in the voltage rang of 2.2-4.4 V. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：311 / 316

页数：6

共 38 条

[1] A polymer electrolyte-based rechargeable lithium/oxygen battery [J].