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Article Dans Une Revue ACS Applied Energy Materials Année : 2023

Converting the Liquid Electrolyte of Li Batteries into a Catalyst for CO 2 RR via Laser Irradiation

Résumé

Li-based batteries are currently the most widely used energy storage technology in electric vehicles and portable electronic devices, but discarded batteries represent a growing environmental hazard. The flammability of the liquid electrolyte particularly requires exploration of alternative recycling methods. Herein, we report the photochemical conversion of usual carbonate-based electrolytes into a new catalyst with remarkable activity and selectivity for the CO2 reduction reaction. Solutions of LiPF6 in different organic solvents are first deposited on a Cu substrate and irradiated by a 1.88 eV laser. After air exposure, a layer consisting of LiF and graphitic carbon deposited on CuxO is obtained. When tested for the electrochemical reduction of CO2, this material converts in situ into an effective catalyst with a faradic efficiency as high as 46.7% for CH4, which is maintained above 40% for at least 100 h.

Domaines

Chimie
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Dates et versions

hal-04171252 , version 1 (05-09-2023)

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Feihong Ren, Kun Qi, Jiefeng Liu, Patrice Huguet, Damien Voiry, et al.. Converting the Liquid Electrolyte of Li Batteries into a Catalyst for CO 2 RR via Laser Irradiation. ACS Applied Energy Materials, 2023, 6 (12), pp.6773-6780. ⟨10.1021/acsaem.3c00949⟩. ⟨hal-04171252⟩
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