Preinserted Ammonium in MnO₂ to Enhance Charge Storage in Dimethyl Sulfoxide Based Zinc-Ion Batteries.

ABSTRACT: Nonaqueous zinc-ion batteries (NZIBs) featuring manganese dioxide (MnO₂) cathodes position themselves as viable options for large-scale energy storage systems. Herein, we demonstrate the use of ammonium cation as a preintercalant to improve the performance of the δ-MnO₂ cathode in wet dimethyl sulfoxide based electrolytes. Employing in situ X-ray absorption spectroscopy, Raman spectroscopy, and synchrotron X-ray diffraction, we reveal that the integration of ammonium cations promotes the formation of NH-O-Mn networks. These networks are crucial for manipulating the distortion of the MnO₆ octahedral units during discharging, thereby mitigating charge disproportionation, which is a primary limitation to MnO₂'s charge-storage efficiency. The modifie

SUBMITTER: Kao-Ian W 

PROVIDER: S-EPMC11503515 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature