New colloidal energy storage battery

Are colloidal electrodes suitable for ultra-stable batteries?

Volume 27, Issue 11, 15 November 2024, 111229 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.

How can colloid additives improve battery performance?

Benefiting from stable colloid additives, aqueous colloid electrolytes as fast ion carriers can modulate the typical electrolyte system for improving reversible plating/stripping on Zn anode for high-performance Zn ion batteries 43, 44. The side reactions during battery cycling are another critical issue that affects battery stability.

Are aqueous Zn-i flow batteries suitable for high-power-density energy storage?

Aqueous Zn-I flow batteries utilizing low-cost porous membranes are promising candidates for high-power-density large-scale energy storage. However, capacity loss and low Coulombic efficiency resulting from polyiodide cross-over hinder the grid-level battery performance. Nature Communications 15, Article number: 3841 (2024)

Why are colloidal electrodes better than solid-state electrodes?

Colloidal electrode materials offer competitive fixation properties for redox-active species compared to conventional solid-state electrodes, while preventing the particle cracking or pulverization observed in conventional solid-state electrode materials, such as inorganic and organic particles.

Does polyiodide cross-over affect grid-level battery performance?

Polyiodide cross-over hinders grid-level battery performance by causing capacity loss and low Coulombic efficiency. To address this, we develop colloidal chemistry for iodine-starch catholytes, endowing enlarged-sized active materials by strong chemisorption-induced colloidal aggregation.

What are zinc-iodine flow batteries?

Zinc-iodine flow batteries (Zn-I FBs) are a type of energy storage system. In their cell assembly configuration, polytetrafluoroethylene (PTFE) frames serve as the flow channel to fix the position of the pretreated three-dimensional electrodes.