生物基以太溶剂和离子液电解质用于可持续的空气电池
Pierre L Stigliano1,2, Nagore Ortiz-Vitoriano3,4, Lidia Medinilla3
1Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia. cpg@deakin.edu.au.
Faraday discussions
|October 10, 2023
概括
这项研究引入了1,2,3-trimethoxypropane (TMP) 作为一种更安全,更绿色的电解质溶剂,用于空气电池 (SAB). 添加辅助溶剂提高了性能和减少了副作用,为更少毒性电池技术铺平了道路.
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:
- 空气电池 (SAB) 理论上具有较高的能量密度,但依赖于易燃和有毒的有机溶剂,如.
- 安全问题限制了当前SAB技术的实际应用.
- 开发更安全的电解质替代品对于下一代电池至关重要.
研究的目的:
- 调查1,2,3-trimethoxypropane (TMP) 作为SABs中diglyme的分支以太溶剂替代品.
- 为了解决TMP与金属的反应性,并提高电解质稳定性.
- 通过电解质配方和阳极保护来提高SAB的性能和安全性.
主要方法:
- 用基于TMP的电解质对SAB进行电化学测试.
- 使用Na-β-磁盘进行阳极保护.
- 使用SEM,拉曼和23NaNMR光谱学进行排放产品的表征.
- 研究作为辅溶剂的N-丁-N-甲基pyrrolidinium bis(trifluoromethylsulfonyl) imide ([C4mpyr][TFSI]) 的作用.
主要成果:
- 确定了TMP的三级碳与金属的反应性,通过[C4mpyr][TFSI]辅溶剂减轻.
- 实现了高达1.92 mA h cm-2 (TMP) 和2.31 mA h cm-2 (TMP/[C4mpyr][TFSI]) 的更好的放电能力.
- 确认NaO2立方体是主要的排放产品,并观察到混合电解质的副作用形成减少 (比率2.4比0.8).
结论:
- 酸显示出作为空气电池更安全的基溶剂的巨大潜力.
- 包括辅溶剂在内的电解质组合设计对于优化SAB性能和安全至关重要.
- 这项研究有助于开发更绿色,更少有毒的储能解决方案.
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