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Production of gas-releasing electrolyte-replenishing Ah-scale zinc metal pouch cells with aqueous gel electrolyte

Engineering and Technology

Production of gas-releasing electrolyte-replenishing Ah-scale zinc metal pouch cells with aqueous gel electrolyte

F. Wang, J. Zhang, et al.

Discover the innovative 'open' pouch cell design for aqueous zinc batteries, which addresses critical issues like hydrogen gas evolution and electrolyte loss. This groundbreaking research, conducted by Feifei Wang and colleagues, showcases a gel electrolyte that enhances performance, achieving impressive discharge capacity and longevity in cycling.

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Playback language: English
Abstract
Aqueous zinc batteries are promising for grid-scale energy storage due to their safety and low cost. However, large-format production is hindered by electrolyte consumption, hydrogen gas evolution, and dendrite growth. This study introduces an "open" pouch cell design that releases hydrogen and allows electrolyte replenishment. A gel electrolyte using crosslinked kappa-carrageenan and chitosan prevents leakage and evaporation. A Zn||ZnxV2O5·nH2O multi-layer pouch cell achieved an initial discharge capacity of 0.9 Ah and 84% capacity retention after 200 cycles.
Publisher
Nature Communications
Published On
Jul 14, 2023
Authors
Feifei Wang, Jipeng Zhang, Haotian Lu, Hanbing Zhu, Zihui Chen, Lu Wang, Jinyang Yu, Conghui You, Wenhao Li, Jianwei Song, Zhe Weng, Chunpeng Yang, Quan-Hong Yang
Tags
zinc batteries
energy storage
electrolyte consumption
hydrogen gas
dendrite growth
pouch cell
capacity retention

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