A unique iodide-based ionic liquid developed by the research group led by Professor Shujiang Ding from the School of Chemistry at Xi'an Jiaotong University serves as a positive electrode material for zinc-ion batteries, achieving both high areal capacity and excellent cycling stability of iodine cathode. This study, highlighting for the first time the influence of intrinsic conductivity of halogen cathode materials on battery properties, has recently been published in the Journal of the American Chemical Society.
It is reported that the ionic liquid positive electrode material exhibits superior mass and charge transfer capabilities, resulting in a four-order-of-magnitude increase in conductivity compared to pure iodine. Additionally, the highly hydrophobic nature of the ionic liquid electrode significantly reduces its shuttle effect. Based on these outstanding properties, zinc-iodine batteries assembled with this material demonstrate stable cycling for over 990 hours at a high areal capacity of 3 mAh cm^-2 and can sustain over 4000 cycles at high rates.
Furthermore, flexible batteries designed and fabricated using this liquid positive electrode material not only achieve high-voltage operation through circuit design but also exhibit stable cycling under a unique polarity reversal mode.
For more information, refer to the related paper: https://doi.org/10.1021/jacs.3c12695.
