Can colloidal electrolyte stabilize cryogenic Zn metal battery?

Here, the authors design a “beyond aqueous” colloidal electrolyte with ultralow salt concentration and inherent low freezing point and investigate its colloidal behaviors and underlying mechanistic principles to stabilize cryogenic Zn metal battery.

What is a colloid electrolyte?

This electrolyte design enables extremely fast-charging capabilities of the full cell, both at 8C (83.1% state of charge) and 10C (81.3% state of charge). Remarkably, the colloid electrolyte demonstrates record-breaking cycling performance at 10C (capacity retention of 92.39% after 400 cycles).

How to prepare inorganic colloidal electrolyte?

The inorganic colloidal electrolyte is prepared by directly added the normal liquid electrolyte (2 M ZnSO 4 + 0.1 M MnSO 4) to the raw palygorskite inorganic material, and the Tyndall effect is observed (Fig. S1).

Does colloid electrolyte perform well at 10C?

Remarkably, the colloid electrolyte demonstrates record-breaking cycling performance at 10C (capacity retention of 92.39% after 400 cycles). Moreover, benefiting from the robust adsorption capability of mesoporous CON towards HF and water, a notable improvement is observed in the calendar life of the full cell.

How does ion concentration affect the behavior of colloidal particles?

During the battery cycle process, factors such as the electric field effect and its constantly changing direction, ion concentration’s variations at the interface, and bulk phase of electrolyte can significantly influence both the stable state and motion behavior of colloidal particles.

How stable is a colloidal is FB?

The colloidal IS-based Zn-IS FBs with polypropylene (PP) membranes as LPPM could deliver superior performance of cycling stability for 350 cycles at high current density. In addition, due to the strong chemisorption between starch and iodine redox, the as-developed colloidal IS systems remained stable.