低成本和不易燃的优特基电解质用于先进的Zn-I电池
Junnan Hao1, Libei Yuan2, Yilong Zhu1
1School of Chemical Engineering, The University of Adelaide, 5005, Adelaide, SA, Australia.
Angewandte Chemie (International ed. in English)
|August 7, 2023
概括
基于硫酸的新型电解质为-电池提供了安全和经济有效的替代品. 这些电解质表现出高稳定性和性能,解决了以前系统的局限性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 基于ZnCl2/Zn(CF3SO3)2/Zn(TFSI) 2的欧特克电解质对Zn-I2电池具有前景,但面临安全和成本挑战.
- 开发更安全,更经济的电解质系统对于推进Zn-I2电池技术至关重要.
研究的目的:
- 为先进的Zn-I2电池引入新型,安全和具有成本效益的基于ZnSO4的性电解质.
- 研究这些新电解质在多醇溶剂中的溶解机制和稳定性.
主要方法:
- 基于ZnSO4的性电解质的合成和表征,使用各种多醇.
- 使用开发的电解质,对Zn-I2电池的电化学性能评估,包括循环稳定性和速率能力.
- 制造和测试具有高活性物质负载的缩放式囊细胞.
主要成果:
- 与传统系统相比,开发的基于ZnSO4的解电解质具有非易燃性,成本显著降低 (<1/200).
- 基于乙烯甘醇的化欧电解液证明有效地抑制了I2穿效应和Zn阳极副作用.
- Zn-I2 电池在 1 摄氏度显示高可逆性,在 20 摄氏度保持 91.4% 的容量.
- 在500个循环后,在333毫克厘米-2.2的记录质量负载下,扩大规模的囊细胞实现了96.7%的容量保留.
结论:
- 基于ZnSO4的解电解质是Zn-I2电池的安全,经济高效和高性能替代品.
- 聚醇溶剂与 Zn2+ 和水的相互作用有助于电解质的稳定性.
- 这项研究扩大了用于下一代水性电池设计的eutectic电解质的范围.
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