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Article Abstract
Rechargeable nickel-ion batteries (RNiBs) have attracted significant attention because of their high volumetric density, low cost, environmental friendliness, and easy recyclability. In this study, a rechargeable nickel-iodine battery using a rational design of a deep eutectic solvent (DES) electrolyte based on a conversion reaction mechanism is first demonstrated. The rechargeable Ni-I battery with the DES electrolyte delivered a specific capacity of 201 mAh g with a coulombic efficiency of 82.5% over 65 cycles at a current density of 0.3 A g. The energy storage mechanism can be attributed to I/I redox chemistry, which has been validated by ex situ Raman, X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The study provides an avenue for exploring rechargeable nickel-ion batteries with DES electrolytes based on the conversion reaction mechanism.
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| http://dx.doi.org/10.1002/smll.202412549 | DOI Listing |
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