Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

CO2 Ionized Poly(vinyl alcohol) Electrolyte for CO2‐Tolerant Zn‐Air Batteries

CO2 Ionized Poly(vinyl alcohol) Electrolyte for CO2‐Tolerant Zn‐Air Batteries CO2 poisoning of alkaline electrolytes is a critical issue that affects the energy efficiency and lifespan of Zn‐air batteries. However, few strategies have been explored to address this issue because it is challenging to block CO2 from the outer atmosphere. Herein, a CO2‐tolerant flexible quasi‐solid‐state electrolyte for Zn‐air batteries, which is achieved by the pre‐fixation of CO2 on poly(vinyl alcohol) (PVA) via its ionization in the form of side ‐OCO2‐ groups (PVA‐TMG), is reported. The pre‐fixation of CO2 enables excellent CO2 tolerance and alleviates the Zn dendrite and ZnO deposition, because the ‐OCO2‐ groups can strongly interact with the Zn2+. In addition, PVA‐TMG exhibits higher ionic conductivity and better water retention capability than the pristine PVA. Consequently, the fabricated Zn‐air batteries deliver excellent performance in both air and a CO2‐rich atmosphere. The optimized PVA‐TMG presents a cycling lifetime 12 times longer than that of the pristine PVA in the atmosphere with 22.7 vol% CO2. The feasible study presented here presents a new milestone in CO2 utilization with energy storage technology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Energy Materials Wiley

CO2 Ionized Poly(vinyl alcohol) Electrolyte for CO2‐Tolerant Zn‐Air Batteries

Loading next page...
 
/lp/wiley/co2-ionized-poly-vinyl-alcohol-electrolyte-for-co2-tolerant-zn-air-mWjKw0lo9a

References (61)

Publisher
Wiley
Copyright
© 2021 Wiley‐VCH GmbH
ISSN
1614-6832
eISSN
1614-6840
DOI
10.1002/aenm.202102047
Publisher site
See Article on Publisher Site

Abstract

CO2 poisoning of alkaline electrolytes is a critical issue that affects the energy efficiency and lifespan of Zn‐air batteries. However, few strategies have been explored to address this issue because it is challenging to block CO2 from the outer atmosphere. Herein, a CO2‐tolerant flexible quasi‐solid‐state electrolyte for Zn‐air batteries, which is achieved by the pre‐fixation of CO2 on poly(vinyl alcohol) (PVA) via its ionization in the form of side ‐OCO2‐ groups (PVA‐TMG), is reported. The pre‐fixation of CO2 enables excellent CO2 tolerance and alleviates the Zn dendrite and ZnO deposition, because the ‐OCO2‐ groups can strongly interact with the Zn2+. In addition, PVA‐TMG exhibits higher ionic conductivity and better water retention capability than the pristine PVA. Consequently, the fabricated Zn‐air batteries deliver excellent performance in both air and a CO2‐rich atmosphere. The optimized PVA‐TMG presents a cycling lifetime 12 times longer than that of the pristine PVA in the atmosphere with 22.7 vol% CO2. The feasible study presented here presents a new milestone in CO2 utilization with energy storage technology.

Journal

Advanced Energy MaterialsWiley

Published: Oct 1, 2021

Keywords: CO 2 tolerance; poly(vinyl alcohol); quasi‐solid‐state electrolytes; Zn‐air batteries

There are no references for this article.