Gel Polymer Electrolyte Sheet (10cm*10cm) for Aqueous Zinc-Ion Battery, CAZIBGPES
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A Gel Polymer Electrolyte (GPE) sheet for Aqueous Zinc-Ion Batteries (AZIBs) represents a critical advancement that bridges the gap between conventional liquid electrolytes and solid-state separators. It consists of a hydrophilic polymer backbone (such as poly(vinyl alcohol), polyacrylamide, or cellulose derivatives) that physically traps an aqueous zinc salt solution within its swollen 3D network, acting simultaneously as an ionic conductor and a physical separator.
Traditional liquid electrolytes in AZIBs offer high ionic conductivity but suffer from severe operational vulnerabilities that limit cycle life and safety. GPE sheets mitigate these failure modes through distinct mechanisms: (1) Suppression of Zinc Dendrites: Liquid electrolytes often permit uneven local electric field distributions and localized Zn^{2+} flux, leading to sharp zinc dendrites that pierce glass-fiber separators and cause short circuits. A solid/gel polymer matrix regulates ion diffusion, promoting uniform Zn^{2+} electrodeposition. (2) Mitigation of Parasitic Side Reactions: Free water molecules in liquid electrolytes drive parasitic hydrogen evolution reactions (HER), corrosion of the zinc anode, and surface passivation via basic zinc salts. The polymer chains coordinate with water molecules, lowering solvent activity and reducing bulk water-induced degradation. (3) Prevention of Cathode Dissolution: In systems utilizing transition metal oxide cathodes (e.g., V2O5, manganese-based hosts), active material dissolution into the liquid electrolyte causes rapid capacity fading. GPE sheets restrict active species migration and maintain localized chemical equilibrium.
| Part Number |
CAZIBGPES (C-AZIB-GPES) |
| Appearance |
Transparent sheet block |
| GPE Composition |
ZnCl2+PVA+Glycerol+H2O |
| Sheet Sizes |
Thickness=1 mm Round Disc (for coin cell): D=16 mm and 19 mm (10 pcs/pack) Rectangular Sheet: 10cm*10cm (1 pcs/pack) |
| Tensile Capacity |
~8 N |
| Stress |
~50 N |
| Ionic Conductivity |
12 mS/cm |
| Initial Capacity |
300 mAh at 0.1 A/g MnO2 |
Notes: Please try to store the GPE sheet in a dry place.
References:
- J. Du, et al. A high strength and dendrite free low-temperature nanocellulose composite PVA gel electrolyte for zinc ion batteries, J. Mater. Chem. C (2025) 13 (40): 20531–20539.
- R. Qi, et al. Gel Polymer Electrolyte toward Large-Scale Application of Aqueous Zinc Batteries, Adv. Fcunt. Mater., 2023, 33, 2306052