Unlocking a Fast Track for Magnesium Migration in Cu 1.8 S 1- x Se x via Anion-Tuning Chemistry.

Autor: Ma H; Hebei Key Laboratory of Optic-Electronic Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding, 071002, China., Wang Z; Henan Engineering Research Center of Design and Recycle for Advanced Electrochemical Energy Storage Material, School of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, China., Du Y; Hebei Key Laboratory of Optic-Electronic Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding, 071002, China., Zhang W; Hebei Key Laboratory of Optic-Electronic Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding, 071002, China., Yang HY; Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372, Singapore., Chen S; Hebei Key Laboratory of Optic-Electronic Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2024 Aug 28; Vol. 24 (34), pp. 10458-10466. Date of Electronic Publication: 2024 Aug 15.
DOI: 10.1021/acs.nanolett.4c01651
Abstrakt: Rechargeable magnesium batteries (rMBs) are promising candidates for next-generation batteries in which sulfides are widely used as cathode materials. The slow kinetics, low redox reversibility, and poor magnesium storage stability induced by the large Coulombic resistance and ionic polarization of Mg 2+ ions have obstructed the development of high-performance rMBs. Herein, a Cu 1.8 S 1- x Se x cathode material with a two-dimensional sheet structure has been prepared by an anion-tuning strategy, achieving improved magnesium storage capacity and cycling stability. Element-specific synchrotron radiation analysis is evidence that selenium incorporation has indeed changed the chemical state of Cu species. Density functional theory calculations combined with kinetics analysis reveal that the anionic substitution endows the Cu 1.8 S 1- x Se x electrode with favorable charge-transfer kinetics and low ion diffusion barrier. The principal magnesium storage mechanisms and structural evolution process have been revealed in details based on a series of ex situ investigations. Our findings provide an effective heteroatom-tuning tactic of optimizing electrode structure toward advanced energy storage devices.
Databáze: MEDLINE
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