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首页> 外文期刊>Advanced functional materials >Phthalocyanine Based Metal–Organic Framework Ultrathin Nanosheet for Efficient Photocathode toward Light-Assisted Li–CO_2 Battery
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Phthalocyanine Based Metal–Organic Framework Ultrathin Nanosheet for Efficient Photocathode toward Light-Assisted Li–CO_2 Battery

机译：Phthalocyanine Based Metal–Organic Framework Ultrathin Nanosheet for Efficient Photocathode toward Light-Assisted Li–CO_2 Battery

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摘要

Light-assisted Li–CO_2 battery, emerging as a powerful battery-technology toutilize light-energy, has attracted much attention yet it is still limited by thelack of efficient photocathode catalysts toward simultaneously promotedCO_2 activation/evolution processes. Here, a kind of phthalocyanine-basedmetal–organic framework nanosheet (CoPc–Mn–O) is prepared and appliedas efficient photocathode catalyst in light-assisted Li–CO2 battery. ThusproducedCoPc–Mn–O shows nanosheet-morphology (≈1 nm), dual activemetal-sites (i.e., Co–N4 and Mn–O4), high conductivity, and photosensitivity.The resulting battery delivers a high round-trip efficiency of 98.5% with anultralow voltage hysteresis of 0.05 V and superior cycling-stability (81.3%)for 60 h at 0.02 mA cm~(?2), which is represented to be one of the best photocathodesto date. Density functional theory calculations and characterizationsprove that the presence of photosensitive CoPc–Mn–O with dual activemetal-sites endows an activation energy (3.2 eV) for CO_2 activation underlight condition and simultaneously promote the CO_2 evolution to enhance thebattery efficiency.

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