Zwitterionic Polymer Micelles Enable Interface Regulation for Long-Life Aqueous Zinc-Iodine Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 42124456.
- Also identified by DOI 10.1021/acs.nanolett.6c00732.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Aqueous zinc-iodine batteries are promising for safe and low-cost energy storage, yet their practical performance is hindered by zinc dendrite growth and polyiodide shuttling. Herein, we propose an interfacial regulation strategy based on self-assembled polymer micelles. We designed a zwitterionic polymer containing imidazole-sulfonate and acrylamide units that spontaneously forms nanoscale micelles in ZnSO<sub>4</sub> electrolyte and adsorb onto zinc electrode surfaces, constructing a multifunctional interface layer. This layer reconstructs Zn<sup>2+</sup> solvation, reduces water activity, and enables uniform zinc deposition, thus suppressing dendrites and corrosion. Meanwhile, multivalent interactions within the micelles immobilize polyiodide species, mitigating the shuttle effect. As a result, Zn||Zn cells achieve stable cycling for over 5000 h, and Zn-I<sub>2</sub> pouch cells retain 93.3% capacity after 100 cycles at high iodine loading (33.06 mg cm<sup>-2</sup>). This work demonstrates polymer micelle self-assembly as an effective strategy for interfacial regulation in zinc-iodine batteries.