氧电池的热稳定电解质及其无金属版本
Stanislav Levchenko1, Edoardo Barcaro1, Alessio Comini1
1Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Fossato di Mortara 17, Ferrara 44121, Italy.
Journal of colloid and interface science
|December 12, 2025
概括
这项研究探讨了氧 (Li-O2) 细胞的电解质,使用聚乙烯糖醇二甲基以太 (PEGDME 250) 与二三甲硫尼尔) 胺 (LiTFSI) 和酸 (LiNO3). 添加LiNO3显著提高了电池容量和性能,使得更高的能量储存.
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:
- 聚乙烯甘二甲基以太 (PEGDME 250) 是氧 (Li-O2) 细胞的一个有前途的溶剂,由于其低挥发性和高热稳定性.
- 电解质成分对于优化Li-O2细胞性能至关重要,影响导电性,稳定性和容量.
研究的目的:
- 调查二三甲硫尼尔) 胺 (LiTFSI) 和酸 (LiNO) 对基于PEGDME 250的电解质的化学和电化学性能的联合作用.
- 评估LiNO3对固体电解质介相 (SEI),金属稳定性和整体Li-O2细胞性能的影响.
- 评估使用这些优化电解质的氧和无金属 (离子) 电池的性能提升.
主要方法:
- 含有LiTFSI和LiNO的PEGDME 250电解质的电化学表征.
- 分析盐溶剂相互作用及其对电解质热性质的影响.
- 添加LiNO2和没有添加LiNO3的Li-O2细胞的性能测试,包括容量和循环稳定性.
- 使用开发的电解质,评估使用O2和LixSn@C合金阳极的无金属离子电池.
主要成果:
- 电解质的导电性从85°C的10−3S cm−1到-7°C的10−4S cm−1,其Li+转移数 (t+) 接近0.6.
- NO3的结合增强了固体电解质间相 (SEI),稳定了金属,并提高了低于61°C的导电性.
- 具有LiNO的Li-O2电池在电压切断条件下显示出明显更高的可逆容量 (4500 mAh g-1) 与没有 (2000 mAh g-1) 的电池相比.
- 无金属离子电池表现出更好的性能,容量从50到450mAhg-1不等.
结论:
- 在PEGDME 250电解质中LiTFSI和LiNO3的组合为高能,稳定的Li-O2和无金属Li-ion电池提供了一条途径.
- NO3在增强SEI形成和改善电解质导电性和电化学性能方面发挥着至关重要的作用.
- 这些发现支持开发具有成本效益和环境可持续的高能储能系统.
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