基于Mg的pyrrolidinium电解质的增强的离子运输特性 (FSA) 2
Yoshifumi Hirotsu1, Mizuki Kimura1, Shinkoh Nanbu1
1Department of Materials & Life Sciences, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan. masahi-f@sophia.ac.jp.
Physical chemistry chemical physics : PCCP
|May 14, 2025
概括
用于离子电池的新固体电解质是使用有机离子塑料晶体 (OIPC) 和二硫胺 (FSA) 盐开发的. 这些基于固态FSA的复合材料显示出有前途的离子导电性和Mg转移数,性能优于液体电解质.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 固态化学 固态化学
背景情况:
- 有机离子塑料晶体 (OIPC) 是具有高热和电化学稳定性的先进固体电解质.
- 在离子 (Mg-ion) 电解质中OIPCs的应用尚未得到充分研究.
- 基于化硫胺 (FSA) 离子的材料为固体Mg-离子导体提供了潜在的潜力.
研究的目的:
- 使用基于的OIPC和Mg (FSA) 的Mg离子导体进行合成和表征.
- 研究Mg盐度对离子导电性,Mg转移数 (tMg) 和热稳定性的影响.
- 为了评估这些固体电解质在Mg离子电池应用中的性能.
主要方法:
- [C2epyr][FSA]/Mg(FSA)2复合材料的制备,其度 (mol%) 含有不同的Mg(FSA)2.
- 测量离子导电性,相位过渡和Mg转移数 (tMg).
- 循环电压测量以评估高温下Mg的氧化还原行为.
主要成果:
- 复合材料在10mol%以下仍然是固体,而在10mol%以上则是液体.
- 在25°C时,最高的离子导电率 (1.78 × 10−3 S cm−1) 是通过[C−2][FSA]/Mg−FSA) (10mol%) 实现的.
- 固态复合材料 (低于10mol%的Mg盐) 与液体对应物 (<0.16) 相比,表现出更高的tMg (≥0.26).
- [C2epyr][FSA]/Mg(FSA) 2 (5mol%) 在60°C时显示出Mg的氧化还原活性.
结论:
- 基于FSA阳离子的OIPC复合材料在固态中表现为Mg离子导体的性能优越.
- 优化Mg盐度对于平衡离子导电性和固态特性至关重要.
- 这些发现凸显了固态OIPC在下一代Mg离子电池电解质方面的潜力.
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