含有Li-Ga合金的混合固体电解质间相通过现场聚合诱导,用于高性能金属电池
Binyu Lu1, Liuyi Hu1, Wenkui Zhang1
1College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
ACS applied materials & interfaces
|October 4, 2024
概括
研究人员开发了一种新的凝电解质,用于更安全,更高性能的金属电池 (LMB). 这种稳定的电解质可以防止树的生长,从而提供长期有效的储能解决方案.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 准固态金属电池 (LMB) 对于下一代能源存储至关重要,因为它们的高特异能和安全性.
- 基于聚1,3-二氧化 (PDOL) 的电解质提供低成本和高离子导电性,但患有界面问题和LMB中的树生长.
研究的目的:
- 开发一种稳定,现场聚合的凝电解质,用于高性能和安全的LMB.
- 为了解决LMBs的界面恶化和树生长.
主要方法:
- 在现场聚合使用Ga(OTF) 3作为启动剂,以创建基于PDOL的凝电解质 (GaPD).
- 在金属上形成的固体电解质介相 (SEI) 的表征.
- 密度函数理论 (DFT) 计算以了解SEI属性.
- 对Li/GaPD/Li对称细胞和LiFePO4/GaPD/Li细胞进行电化学测试.
主要成果:
- 在金属阳极上形成了由化/Li2O/Li-Ga合金组成的混合稳定固体电解质间相 (SEI).
- DFT的计算证实了混合型SEI对Li+的高度亲和力,促进了统一的Li+沉积.
- /GaPD/电池在室温下1600小时稳定运行.
- LiFePO4/GaPD/Li电池在1C的200个循环中实现了90.2%的容量保留.
结论:
- 开发的GaPD电解质有效地抑制了树的生长,并增强了LMBs的界面稳定性.
- 这一战略为在高性能和安全的LMB中实践应用现场聚合提供了一个有前途的方法.
- 这些发现为推进固态电池技术提供了宝贵的参考.
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