From Copper to Basic Copper Carbonate: A Reversible Conversion Cathode in Aqueous Anion Batteries
From Copper to Basic Copper Carbonate: A Reversible Conversion Cathode in Aqueous Anion Batteries
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从铜到碱式碳酸铜：水系阴离子电池中的可逆转换阴极
DOI：
10.1002/anie.202203837
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Ji, Xiulei
中科院分区：
文献类型：
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作者：
Gallagher, Trenton C.;Wu, Che‐Yu;Lucero, Marcos;Sandstrom, Sean K.;Hagglund, Lindsey;Jiang, Heng;Stickle, William;Feng, Zhenxing;Ji, Xiulei
使用阴离子和阳离子作为电荷载体的双离子电池代表了一种有前途的能量存储技术。然而，一个未知领域是探索过渡金属作为转化反应中碳酸盐的电极。在这里，我们报道了从铜到 Cu2CO3(OH)2 的可逆转化反应，其中包含 K2CO3 和 KOH 固体的铜电极具有阴离子电荷载流子自给自足。该电极在电池充电和放电过程中分离和结合 K+ 离子。铜活性物质和阴离子阴极分别表现出664 mAh g−1和299 mAh g−1的可逆容量，并且在K2CO3和KOH的饱和混合电解质中具有相对稳定的循环。这些结果为使用碳酸盐作为电池的电荷载体以消耗和储存二氧化碳开辟了道路。
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 Cu2CO3(OH)2, where the copper electrode comprising K2CO3and 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−1and 299 mAh g−1, respectively, and relatively stable cycling in a saturated mixture electrolyte of K2CO3and KOH. The results open an avenue to use carbonate as a charge carrier for batteries to serve for the consumption and storage of CO2.