Issue 1, 2024

Advanced electrolyte with high stability and low-temperature resistance for zinc-ion batteries

Abstract

Aqueous zinc-ion batteries (AZIBs) are considered to be a green and safe energy storage system. However, electrolyte leakage, zinc dendrite growth and side reactions are still barriers to their practical application. A quasi-solid sodium alginate gel electrolyte (GE) was designed to alleviate these pain points. To further stabilize the water molecules in this GE and extend its application to subzero temperatures, a disaccharide called trehalose (TreH) was introduced as a multifunctional additive. The rational introduction of TreH notably improved the strength (186.6 kPa) of the sodium alginate GE while retaining a high ionic conductivity (22.4 mS cm−1) at 25 °C. The zinc–polyaniline full battery assembled with this composite GE exhibited a capacity retention of 70.4% after 500 cycles at 25 °C, and still delivered a reversible capacity of 120.6 mA h g−1 at −20 °C. These results show that the sodium alginate GE with trehalose as an additive has great potential for development in AZIBs.

Graphical abstract: Advanced electrolyte with high stability and low-temperature resistance for zinc-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
23 Aug 2023
Accepted
20 Nov 2023
First published
22 Nov 2023

J. Mater. Chem. A, 2024,12, 277-285

Advanced electrolyte with high stability and low-temperature resistance for zinc-ion batteries

Q. Bai, Q. Meng, W. Liu, W. Lin, P. Yi, J. Tang, G. Zhang, P. Cao and J. Yang, J. Mater. Chem. A, 2024, 12, 277 DOI: 10.1039/D3TA05052A

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