Polyethylene glycol-based colloidal electrode via water competition for ultra-stable aqueous Zn-I batteries.

ABSTRACT: Current solid- and liquid-state electrode materials with extreme physical states show inherent limitation in achieving the ultra-stable batteries. Herein, we present a colloidal electrode design with an intermediate physical state to integrate the advantages of both solid- and liquid-state materials. The colloidal electrode was designed based on the inherent water competition effect of (SO₄)^2- from the aqueous electrolyte and inherently water-soluble polyethylene glycol (PEG)/ZnI₂ from the cathode. The constructed aqueous Zn||PEG/ZnI₂ colloid battery demonstrated ultra-stable cycling performance with Coulombic efficiencies approaching 100% and a capacity retention of 86.7% over 10,700 cycles, without requiring anodic modification. In addition, th

SUBMITTER: Zhang K 

PROVIDER: S-EPMC11577285 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature