Activating sulfur oxidation reaction via six-electron redox mesocrystal NiS₂ for sulfur-based aqueous batteries.

ABSTRACT: Sulfur-based aqueous batteries (SABs) are deemed promising candidates for safe, low-cost, and high-capacity energy storage. However, despite their high theoretical capacity, achieving high reversible value remains a great challenge due to the thermodynamic and kinetics problems of elemental sulfur. Here, the reversible six-electron redox electrochemistry is constructed by activating the sulfur oxidation reaction (SOR) process of the elaborate mesocrystal NiS₂ (M-NiS₂). Through the unique 6e^- solid-to-solid conversion mechanism, SOR efficiency can reach an unprecedented degree of ca. 96.0%. The SOR efficiency is further revealed to be closely associated with the kinetics feasibility and thermodynamic stability of the M-NiS₂ intermedium in t

SUBMITTER: Yang Z 

PROVIDER: S-EPMC10171633 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature