Design of Electrolyte Using Deep Eutectic Solvents for High‐Performance Rechargeable Nickel‐Iodine Batteries
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<sub>2</sub> battery with the DES electrolyte delivered a specific capacity of 201 mAh g<sup>-1</sup> with a coulombic efficiency of 82.5% over 65 cycles at a current density of 0.3 A g<sup>-1</sup>. The energy storage mechanism can be attributed to I<sup>+</sup>/I<sup>-</sup> 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.
Authors
- Tai‐Sing Wu (ORCID: https://orcid.org/0000-0002-3285-7258)
- Ling Lee (ORCID: https://orcid.org/0000-0003-0908-7280)
- Yu‐Lun Chueh (ORCID: https://orcid.org/0000-0002-0155-9987)
- Bing‐Ni Gu
- Yu‐Ren Peng
- Heng‐An Lo
- Shu‐Chi Wu (ORCID: https://orcid.org/0000-0001-6008-6609)
- Hsin-Chih Liao
- Yu‐Chieh Hsu (ORCID: https://orcid.org/0000-0002-9516-8898)
- Ying‐Chun Shen
- Yu‐Ting Chen (ORCID: https://orcid.org/0000-0001-9525-8407)
- Shih‐Ming Lin
- Chung‐Yu Chen (ORCID: https://orcid.org/0000-0003-3507-2066)
- Shin‐Yi Tang
Institutions
- National Sun Yat-sen University (TW)
- Korea University (KR)
- National Tsing Hua University (TW)
- National Synchrotron Radiation Research Center (TW)
Publication Details
- Journal
- Small
- Published
- 2025-03-05
- DOI
- https://doi.org/10.1002/smll.202412549
- Citations
- 3
- Primary Topic
- Advanced battery technologies research
- Type
- article
- Field-Weighted Citation Impact
- 2.19