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- W4226160717 abstract "Chalcogenides have been viewed as important conversion-type Mg2+ -storage cathodes to fulfill the high volumetric energy density promise of magnesium (Mg) batteries. However, the low initial Columbic efficiency and the rapid capacity degradation remain challenges for the chalcogenide cathodes, as the clear Mg2+ -storage mechanism has yet to be clarified. Herein, we illustrate that the charge storage mechanism of the Cu2-x Se cathode is a reversible displacement reaction along with a polyselenide (PSe) mediated solution process of anion-compensation. The unique anion redox improves charge storage, while the dissolution of PSe also leads to performance degradation. To address this issue, we introduce Mo6 S8 into the Cu2-x Se cathode to immobilize PSe, which significantly improves performance, especially the reversible capacity (from 140 mAh g-1 to 220 mAh g-1 ). This work provides inspiration for the modification of the Mg2+ -storage cathode, which is a milestone for high-performance Mg batteries." @default.
- W4226160717 created "2022-05-05" @default.
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- W4226160717 date "2022-05-18" @default.
- W4226160717 modified "2023-10-17" @default.
- W4226160717 title "Charge‐Compensation in a Displacement Mg <sup>2+</sup> Storage Cathode through Polyselenide‐Mediated Anion Redox" @default.
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- W4226160717 doi "https://doi.org/10.1002/anie.202204423" @default.
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