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Efficient Rechargeable Li-CO2 Battery with a Liquid Electrolyte-Soluble CuCl2 Electrocatalyst

Bharti, A and Achutharao, G and Bhattacharyya, AJ (2023) Efficient Rechargeable Li-CO2 Battery with a Liquid Electrolyte-Soluble CuCl2 Electrocatalyst. In: ACS Applied Materials and Interfaces, 15 (46). pp. 53342-53350.

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Official URL: https://doi.org/10.1021/acsami.3c09625


We demonstrate here a simple liquid electrolyte soluble Cu-compound, viz., cupric chloride (CuCl2) as an alternative electrocatalyst for nonaqueous Li-CO2 batteries. The key point behind the selection of CuCl2 is that the theoretical potential of Li-CO2 batteries (�2.8 V; Li+|Li) lies within the Cu1+|Cu0 redox couple (2.3-3.3 V; Li+|Li). The presence of CuCl2 in the liquid electrolyte near to the carbon nanotubes (� coelectrocatalyst)-loaded porous-CO2 cathode led to efficient electrocatalysis of CO2 and superior Li-CO2 battery performance. The cell overpotential in the presence of CuCl2 is 0.65 V, which is less than half compared to the one without it (�1.7 V). Extensive investigations precisely elucidate the electrocatalytic mediation of CuCl2 with the redox characteristics of CO2. Additionally, only in the presence of CuCl2, the existence of Li-oxalate (Li2C2O4) is detected, which is a seldomly reported intermediate preceding the formation of Li2CO3 © 2023 American Chemical Society.

Item Type: Journal Article
Publication: ACS Applied Materials and Interfaces
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to ACS Applied Materials and Interfaces.
Keywords: Carbon dioxide; Chlorine compounds; Electrocatalysis; Electrocatalysts; Electrolytes; Lithium; Lithium compounds; Oxalic acid, CO2 redox chemistry; Cu compounds; EIS; Electrochemical characterizations; Hydrodynamic studies; Li +; Liquid electrolytes; Meta-stable state; Redox chemistry; Simple liquids, Copper compounds, carbon nanotube; cupric chloride; cuprous ion; electrolyte; lithium; oxalic acid, article; cathode electrode; controlled study; hydrodynamics; liquid; Raman spectrometry
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 29 Feb 2024 11:56
Last Modified: 29 Feb 2024 11:56
URI: https://eprints.iisc.ac.in/id/eprint/83836

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