A low-cost anodic catalyst of transition metal oxides for lithium extraction from seawater
A low-cost anodic catalyst of transition metal oxides for lithium extraction from seawater
复制标题
用于海水提锂的低成本过渡金属氧化物阳极催化剂
DOI：
10.1039/d0cc01883j
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发表时间：
2020
影响因子：
4.9
通讯作者：
Haoshen Zhou
中科院分区：
文献类型：
--
作者：
Fan Zhang;Sixie Yang;Yuemin Du;Chao Li;Jiejun Bao;Ping He;Haoshen Zhou
海水中的锂储量是陆地上的数万倍，使其成为锂资源的有前景的候选者。据报道，一种基于太阳能电解技术的锂提取方法，以固态电解质Li1.5Al0.5Ge1.5(PO4)3 (LAGP)作为选择性膜，从海水中提取金属锂。在此，通过更换阳极催化剂材料来优化电解池。在所研究的负极材料中，NiO@SP负极表现出优异的电化学性能、相对较高的能量利用效率和较低的成本。采用NiO@SP的电解池在电流密度为333 μA cm−2、电势为4.5 V时实现了57.2 mg W h−1 的锂生产效率。根据原位质谱的研究，析氧反应（OER）和析氯反应（CER）在阳极上同时发生，并产生氧气和次氯酸盐。
Lithium reserves in seawater are tens of thousands of times higher than on land, making it a promising candidate for lithium resources. A lithium extraction method based on a solar-powered electrolysis technique with a solid-state electrolyte, Li1.5Al0.5Ge1.5(PO4)3 (LAGP), as the selective membrane has been reported to obtain metallic lithium from seawater. Herein, the electrolytic cell is optimised by replacing the anode catalyst materials. The NiO@SP anode shows excellent electrochemical performance, relatively high energy utilization efficiency and low cost among the anode materials investigated. An electrolytic cell adopting NiO@SP achieves a lithium production efficiency of 57.2 mg W h−1 with a potential of 4.5 V at a current density of 333 μA cm−2. Based on the investigation by in situ mass spectroscopy the oxygen evolution reaction (OER) and chlorine evolution reaction (CER) occur together on the anode with the production of oxygen and hypochlorite.