结合扬模量和固态电解质的灵活性,在室温下用于高性能电池
Haitao Zhao1, Yan Zhang1, Zehua Zhao1
1State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi, 710049, China. l-li@xjtu.edu.cn.
这项研究探讨了像Young这样的机械性能是如何形成的.
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
- 固态电池 固态电池是什么
背景情况:
- 全固态电池 (ASSB) 是有前途的储能设备,固态复合电解质 (SSCE) 是一个关键的进步.
- 虽然离子导电性至关重要,但电解质对ASSB性能的机械性质 (Young的模量和灵活性) 的影响还没有得到充分研究.
- 优化机械强度和灵活性对于稳定和高效的ASSB至关重要.
研究的目的:
- 研究模和灵活性对ASSB电化学性能的影响.
- 设计和制造一种新的三明治结构的SSCE,平衡机械性能并保持高离子导电性.
- 评估ASSB使用开发的SSCE的性能.
主要方法:
- 制造具有明确内外层的三明治结构SSCE.
- 中层包括Li6.4La3Zr1.4Ta0.6O12,聚乙烯化物-co-hexafluoropropylene和二三甲) 硫胺.
- 电化学测试LiidiyeSSCE的LiidiyeLiFePO4电池,以评估离子导电性,速率性能和循环稳定性.
主要成果:
- 开发的SSCE具有高离子导电性 (在25°C时为4.57 × 10^-4 S cm^-1).
- SSCE有效地抑制了树突,并确保了密切的电极接触.
- 液体体液体SSCE液体LiFePO4细胞表现出极好的速率性能 (0.05°C时155.5mAhg-1,1°C时124.4mAhg-1) 和循环稳定性 (在450个循环后98.8%的保留率).
结论:
- 在SSCE中结合Young的模量和灵活性,可以显著提高ASSB的电化学性能.
- 设计的三明治结构的SSCE为开发高性能ASSB提供了可行的战略.
- 这项研究强调了机械性能在ASSB发展中的关键作用.
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