A Co‐Doped MnO2 Catalyst for Li‐CO2 Batteries with Low Overpotential and Ultrahigh Cyclability

• DOI: 10.1002/smll.201902220
• Publication Date: 2019-07-03T07:50:05Z
• Authors: Bingcheng Ge; Yong Sun; Jianxin Guo; Xiaobin Yan; Carlos Fernandez; Qiuming Peng
• Keywords: Overpotential

Abstract Li‐CO 2 batteries can not only capture CO to solve the greenhouse effect but also serve as next‐generation energy storage devices on merits of economical, environmentally‐friendly, and sustainable aspects. However, these are suffering from two main drawbacks: high overpotential poor cyclability, severely postponing acceleration their applications. Herein, a new Co‐doped alpha‐MnO nanowire catalyst is prepared for rechargeable batteries, which exhibits capacity (8160 mA h g −1 at current density 100 ), low (≈0.73 V), an ultrahigh cyclability (over 500 cycles exceeding those reported so far. The reaction mechanisms interpreted depending in situ experimental observations combination with functional theory calculations. outstanding electrochemical properties mostly associated conductivity, large fraction hierarchical channels, unique Co interstitial doping, might be benefit diffusion , reversibility Li 3 products, prohibition side reactions between electrolyte electrode. These results shed light both fixation storage.