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A Co-Doped MnO2 catalyst for Li-CO2 batteries with low overpotential and ultrahigh cyclability.

Ge, Bingcheng; Sun, Yong; Guo, Jianxin; Yan, Xiaobin; Fernandez, Carlos; Peng, Qiuming


Bingcheng Ge

Yong Sun

Jianxin Guo

Xiaobin Yan

Qiuming Peng


Li-CO2 batteries can not only capture CO2 to solve the greenhouse effect but also serve as next-generation energy storage devices on the merits of economical, environmentally-friendly, and sustainable aspects. However, these batteries are suffering from two main drawbacks: high overpotential and poor cyclability, severely postponing the acceleration of their applications. Herein, a new Co-doped alpha-MnO2 nanowire catalyst is prepared for rechargeable Li-CO2 batteries, which exhibits a high capacity (8160 mA h g−1 at a current density of 100 mA g−1), a low overpotential (≈0.73 V), and an ultrahigh cyclability (over 500 cycles at a current density of 100 mA g−1), exceeding those of Li‐CO2 batteries reported so far. The reaction mechanisms are interpreted depending on in situ experimental observations in combination with density functional theory calculations. The outstanding electrochemical properties are mostly associated with a high conductivity, a large fraction of hierarchical channels, and a unique Co interstitial doping, which might be of benefit for the diffusion of CO2, the reversibility of Li2CO3 products, and the prohibition of side reactions between electrolyte and electrode. These results shed light on both CO2 fixation and new Li-CO2 batteries for energy storage.


GE, B., SUN, Y., GUO, J., YAN, X., FERNANDEZ, C. and PENG, Q. 2019. A Co-Doped MnO2 catalyst for Li-CO2 batteries with low overpotential and ultrahigh cyclability. Small [online], 15(34), article 1902220. Available from:

Journal Article Type Article
Acceptance Date Jun 12, 2019
Online Publication Date Jul 3, 2019
Publication Date Aug 23, 2019
Deposit Date Aug 8, 2019
Publicly Available Date Jul 4, 2020
Journal Small
Print ISSN 1613-6810
Electronic ISSN 1613-6829
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 15
Issue 34
Article Number 1902220
Keywords Catalysts; Cyclability; Lithium-air battery; Low overpotential
Public URL