首页|Cobalt-decorated carbon nanofibers as a low overpotential cathode for nonaqueous Na-CO2 batteries
Cobalt-decorated carbon nanofibers as a low overpotential cathode for nonaqueous Na-CO2 batteries
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NSTL
Elsevier
? 2022 Elsevier B.V.As the high energy-density energy storage and greenhouse gas capture device, Na-CO2 battery development is impeded by the sluggish CO2 reduction and difficult decomposition of insulating discharge products on the cathode. Here, the cobalt (Co)-decorated carbon nanofibers accompanying with slight Co oxidation were used as the self-standing cathode for Na-CO2 battery. It greatly reduces the discharge overpotential by 500 mV and charge overpotential by 210 mV, delivers a 12 times higher discharge capacity and runs nearly 4 times cycle life than its counterpart. Experiment combined with theory calculation demonstrates that the evenly dispersive, abundant and stable active sites (Co-CoO) with an equal CO2 adsorption-desorption capability is the key to improving cell performance. This work reveals the importance of catalysts/cathodes and provides a direction to design highly efficient catalysts/cathodes for alkali metal-CO2 batteries.
Co-CoO catalystEqual CO2 adsorption-desorptionLow overpotentialcathodeNa-CO2 battery
School of Electrical Engineering State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University
School of Chemistry and Chemical Engineering Chongqing University
State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences
Chongqing Key Laboratory of Industrial and Information Technology of Electric Vehicle Safety Evaluation Chongqing Vehicle Test & Research Institute Co. Ltd
NSTL
Elsevier
