Gallagher Trenton C, Wu Che-Yu, Lucero Marcos, Sandstrom Sean K, Hagglund Lindsey, Jiang Heng, Stickle William, Feng Zhenxing, Ji Xiulei
Department of Chemistry, Oregon State University, Corvallis, OR 97331-4003, USA.
School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA.
Angew Chem Int Ed Engl. 2022 Aug 1;61(31):e202203837. doi: 10.1002/anie.202203837. Epub 2022 Jun 10.
Dual-ion batteries that use anions and cations as charge carriers represent a promising energy-storage technology. However, an uncharted area is to explore transition metals as electrodes to host carbonate in conversion reactions. Here we report the reversible conversion reaction from copper to Cu CO (OH) , where the copper electrode comprising K CO and KOH solid is self-sufficient with anion-charge carriers. This electrode dissociates and associates K ions during battery charge and discharge. The copper active mass and the anion-bearing cathode exhibit a reversible capacity of 664 mAh g and 299 mAh g , respectively, and relatively stable cycling in a saturated mixture electrolyte of K CO and KOH. The results open an avenue to use carbonate as a charge carrier for batteries to serve for the consumption and storage of CO .
使用阴离子和阳离子作为电荷载体的双离子电池是一种很有前景的储能技术。然而，一个未知领域是探索过渡金属作为电极，在转化反应中容纳碳酸盐。在此，我们报道了从铜到碱式碳酸铜的可逆转化反应，其中包含碳酸钾和氢氧化钾固体的铜电极自身具备阴离子电荷载体。该电极在电池充放电过程中使钾离子解离和缔合。铜活性物质和含阴离子的阴极分别表现出664 mAh g和299 mAh g的可逆容量，并且在碳酸钾和氢氧化钾的饱和混合电解质中循环相对稳定。这些结果为将碳酸盐用作电池的电荷载体以实现二氧化碳的消耗和存储开辟了一条途径。
