Zhang Liyue, Xu Qiucheng, Wen Shuting, Zhang Haoxuan, Chen Ling, Jiang Hao, Li Chunzhong
Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH-1015, Switzerland.
ACS Nano. 2024 Aug 20;18(33):22454-22464. doi: 10.1021/acsnano.4c07340. Epub 2024 Aug 11.
Recycling spent lithium-ion batteries (LIBs) to efficient water-splitting electrocatalysts is a promising and sustainable technology route for green hydrogen production by renewables. In this work, a fluorinated ternary metal oxide (F-TMO) derived from spent LIBs was successfully converted to a robust water oxidation catalyst for pure water electrolysis by utilizing an anion-exchange membrane. The optimized catalyst delivered a high current density of 3.0 A cm at only 2.56 V and a durability of >300 h at 0.5 A cm, surpassing the noble-metal IrO catalyst. Such excellent performance benefits from an artificially endowed interface layer on the F-TMO, which renders the exposure of active metal (oxy)hydroxide sites with a stabilized configuration during pure water operation. Compared to other metal oxides (i.e., NiO, CoO, MnO), F-TMO possesses a higher stability number of 2.4 × 10, indicating its strong potential for industrial applications. This work provides a feasible way of recycling waste LIBs to valuable electrocatalysts.
将废旧锂离子电池（LIBs）回收再利用制备高效析水电催化剂，是一种通过可再生能源生产绿色氢气的具有前景且可持续的技术路线。在这项工作中，利用阴离子交换膜成功地将源自废旧LIBs的氟化三元金属氧化物（F-TMO）转化为用于纯水分解的稳健析氧催化剂。优化后的催化剂在仅2.56 V的电压下就能提供3.0 A cm的高电流密度，在0.5 A cm的电流密度下具有超过300 h的耐久性，超过了贵金属IrO催化剂。如此优异的性能得益于F-TMO上人工赋予的界面层，该界面层使得活性金属（氧）氢氧化物位点在纯水运行过程中以稳定的构型暴露出来。与其他金属氧化物（如NiO、CoO、MnO）相比，F-TMO具有更高的稳定性数值2.4×10，表明其在工业应用方面具有强大潜力。这项工作为将废旧LIBs回收再利用制备有价值的电催化剂提供了一条可行的途径。
