双核铜配合物催化使锂-CO 电池的放电电压高于 3.0V。
Binuclear Cu complex catalysis enabling Li-CO battery with a high discharge voltage above 3.0 V.
机构信息
Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, P. R. China.
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, P. R. China.
出版信息
Nat Commun. 2023 Feb 1;14(1):536. doi: 10.1038/s41467-023-36276-8.
Li-CO batteries possess exceptional advantages in using greenhouse gases to provide electrical energy. However, these batteries following LiCO-product route usually deliver low output voltage (<2.5 V) and energy efficiency. Besides, LiCO-related parasitic reactions can further degrade battery performance. Herein, we introduce a soluble binuclear copper(I) complex as the liquid catalyst to achieve LiCO products in Li-CO batteries. The Li-CO battery using the copper(I) complex exhibits a high electromotive voltage up to 3.38 V, an increased output voltage of 3.04 V, and an enlarged discharge capacity of 5846 mAh g. And it shows robust cyclability over 400 cycles with additional help of Ru catalyst. We reveal that the copper(I) complex can easily capture CO to form a bridged Cu(II)-oxalate adduct. Subsequently reduction of the adduct occurs during discharge. This work innovatively increases the output voltage of Li-CO batteries to higher than 3.0 V, paving a promising avenue for the design and regulation of CO conversion reactions.
锂电池在利用温室气体提供电能方面具有特殊优势。然而，这些采用 LiCO 产物路线的电池通常输出电压低（<2.5V）且能量效率低。此外，与 LiCO 相关的寄生反应会进一步降低电池性能。在此，我们引入一种可溶性双核铜（I）配合物作为液体催化剂，以在 Li-CO 电池中实现 LiCO 产物。使用铜（I）配合物的 Li-CO 电池表现出高达 3.38V 的高电动势，增加的输出电压为 3.04V，以及扩大的放电容量为 5846 mAh g。并且在 Ru 催化剂的额外帮助下，它显示出超过 400 次循环的稳健循环性。我们揭示了铜（I）配合物可以很容易地捕获 CO 以形成桥连的 Cu(II)-草酸盐加合物。随后，在放电过程中加合物发生还原。这项工作创新性地将 Li-CO 电池的输出电压提高到 3.0V 以上，为 CO 转化反应的设计和调节开辟了一条有前途的途径。
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