Zhang, Leiqian;
Ding, Han;
Gao, Haiqi;
Gong, Jiaming;
Guo, Hele;
Zhang, Shuoqing;
Yu, Yi;
... Liu, Tianxi; + view all
(2025)
An integrated design for high-energy, durable zinc–iodine batteries with ultra-high recycling efficiency.
Energy and Environmental Science
10.1039/d4ee05873a.
(In press).
Preview |
Text
He_d4ee05873a.pdf Download (7MB) | Preview |
Abstract
Zinc–iodine batteries (ZIBs) have long struggled with the uncontrolled spread of polyiodide in aqueous electrolytes, despite their environmentally friendly, inherently safe, and cost-effective nature. Here, we present an integral redesign of ZIBs that encompasses both the electrolyte and cell structure. The developed self-sieving polyiodide-capable liquid–liquid biphasic electrolyte can achieve an impressive polyiodide extraction efficiency of 99.98%, harnessing a meticulously iodine-containing hydrophobic solvated shell in conjunction with the salt-out effect. This advancement facilitates a membrane-free design with a Coulombic efficiency of ∼100% at 0.1C, alongside an ultra-low self-discharge rate of ∼3.4% per month and capacity retention of 83.1% after 1300 cycles (iodine areal loading: 22.2 mg cm−2). Furthermore, the integrated cell structure, paired with the low-cost electrolyte ($4.6 L−1), enables rapid assembly into A h-level batteries within hours (1.18 A h after 100 cycles with a capacity retention of 86.7%), supports electrolyte regeneration with ∼100% recycling efficiency, and extends to ZIBs with a two-electron iodine conversion reaction. This endeavor establishes a novel paradigm for the development of practical zinc–iodine batteries.
| Type: | Article |
|---|---|
| Title: | An integrated design for high-energy, durable zinc–iodine batteries with ultra-high recycling efficiency |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d4ee05873a |
| Publisher version: | https://doi.org/10.1039/d4ee05873a |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. |
| Keywords: | Science & Technology, Physical Sciences, Technology, Life Sciences & Biomedicine, Chemistry, Multidisciplinary, Energy & Fuels, Engineering, Chemical, Environmental Sciences, Chemistry, Engineering, Environmental Sciences & Ecology, SUPERCAPACITORS, ELECTROLYTES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10205526 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
