用于高效光电化学 Li 提取的分层 Si 基光阴极上的混合相 WO 共催化剂。
Mixed-phase WO Cocatalysts on Hierarchical Si-based Photocathode for Efficient Photoelectrochemical Li Extraction.
机构信息
State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, P. R. China.
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
出版信息
Angew Chem Int Ed Engl. 2023 Jun 12;62(24):e202304079. doi: 10.1002/anie.202304079. Epub 2023 May 8.
Photoelectrochemical lithium (Li) extraction can be expected to provide a useful recycle of Li from waste Li-containing battery, but the process is limited by the photocathodes with poor Li absorption and low yield rate. Here, we have designed a hierarchical silicon (Si)-based photocathode with mixed-phase tungsten oxide (WO ) cocatalysts for photoelectrochemical Li extraction under 1 sun illumination, achieving a high Li yield rate of ≈223.0 μg cm h and an excellent faradaic efficiency of 91.9 % at 0.0817 V versus Li redox couple. The WO cocatalysts with the mixture of amorphous and crystalline phase accelerates the Li insertion and precipitation and enriches the concentration of Li at the photocathode surface. This robust photoelectrochemical Li extraction system provides a new insight on designing green and efficient route for cyclic utilization of Li resources in the sustainable energy field.
光电化学锂（Li）提取有望为从含 Li 废物电池中回收 Li 提供一种有用的方法，但该过程受到光阴极对 Li 吸收差和产率低的限制。在这里，我们设计了一种具有混合相氧化钨（WO ）共催化剂的分层硅（Si）基光阴极，用于在 1 个太阳光照下进行光电化学 Li 提取，在 0.0817 V 相对于 Li 氧化还原对时，实现了 ≈223.0μg cm h 的高 Li 产率和 91.9%的优异法拉第效率。具有非晶相和晶相混合物的 WO 共催化剂加速了 Li 的嵌入和沉淀，并在光阴极表面富集了 Li 浓度。这种稳健的光电化学 Li 提取系统为在可持续能源领域设计绿色高效的 Li 资源循环利用途径提供了新的见解。
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