机械和热稳固的凝电解质,由带电的双螺旋聚合物构成
Deyang Yu1, Jungki Min1, Feng Lin1
1Department of Chemistry and Macromolecules Innovation Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA.
Advanced materials (Deerfield Beach, Fla.)
|January 30, 2024
概括
一种新型的硬凝聚合物电解质使用聚二二硫四二二甲胺 (PBDT) 提高了固态电池的性能. 这种基于PBDT的电解质为实际应用提供了更好的机械强度,更广泛的温度稳定性和更高的电池功率.
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
- 聚合物化学 聚合物化学
背景情况:
- 固态电池对于下一代能源存储至关重要.
- 现有的聚合物电解质往往缺乏用于实际电池应用的必要性质.
- 开发强大的高分子电解质以提高性能是关键的研究领域.
研究的目的:
- 开发一种新的刚性凝聚合物电解质,用于固态电池,具有改进的性能.
- 为了研究基于PBDT的聚合物电解质的结构性质关系.
- 为了评估Li/LiFePO4细胞中开发的电解质的电化学性能和热稳定性.
主要方法:
- 一种刚性凝聚合物电解质的合成和表征,该电解质包含聚二二硫四四二丁二甲胺 (PBDT).
- 在PBDT矩阵内固定液体电解质混合物.
- 使用补充技术对离子运输机制的系统研究.
- /LiFePO4电池的电化学性能测试,包括长期循环和热循环.
主要成果:
- 基于PBDT的电解质由于PBDT的刚性双螺旋形状而表现出纳米纤维结构.
- 与基于PEO的电解质相比,增强的机械性能,更广泛的操作温度窗口和更高的电池速率能力.
- 在延长循环过程中,Li/LiFePO4细胞的容量保持非常好.
- 在环境和高温之间证明了热循环的可逆性.
结论:
- 基于PBDT的刚性凝聚合物电解质显示了先进固态电池应用的巨大潜力.
- PBDT的独特结构有助于优越的电解质性能.
- 电解质适用于需要在高温下快速充电,在环境温度下放电速度较慢的电池.
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