Ti 3 C 2 T x MXenes: From Recovery of Pb from Perovskite Solar Cells to Supercapacitor Usage

作者：Marcelo A. Andrade, Alessandro Mezzetti, Francesco Fumagalli, Giacomo Ceccone, Olivier Crosnier, Patrik Johansson, Thierry Brousse · 发表于：Journal of The Electrochemical Society · 年份：2025 · DOI：10.1149/1945-7111/ae1ad5 · 被引用次数：2 · 研究领域：MXene and MAX Phase Materials、Advanced Battery Materials and Technologies、Supercapacitor Materials and Fabrication

Sustainable disposal and valorization of recovered lead from end-of-life perovskite solar cells (PSCs) remain critical challenges from environmental and electrochemical perspectives. Here, we demonstrate a dual-function process wherein Ti 3 C 2 T x MXenes adsorbents are first employed to recover lead from green acetone-based PSC recycling waste and subsequently repurposed as high-performant supercapacitor electrode active materials. Remarkably, Ti 3 C 2 T x achieves >99.9% Pb 2+ ion removal from 100 ppm Pb/acetone solutions, with an adsorption capacity reaching up to 555 mg·g −1 . After adsorption, the Pb-loaded MXene (Ti 3 C 2 T x /Pb ads ) retains its structural integrity and exhibits significantly enhanced electrochemical performance. Electrochemical cycling in a sodium acetate aqueous electrolyte reveals a doubled specific capacity of the MXenes, from ca. 30 C·g −1 to ca. 60C·g −1 , by introducing reversible Pb 2+ /Pb 0 redox activity while maintaining the initial MXene pseudocapacitive behavior. Overall, this conceptual study demonstrates a closed circular materials loop by recovering a green solvent from the PSC recycling, while transforming a hazardous waste stream into a value-added energy storage material.