简单的制造的聚合物电解质与分支结构通过深度优捷电解质启用在现场聚合
Jirong Wang1,2, Yong Zhang1, Weixin Ye1
1Key Laboratory for Material Chemistry of Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
ACS macro letters
|January 18, 2024
概括
研究人员开发了一种用于金属电池的新型凝聚合物电解质. 这种新材料通过在现场形成稳定的固体电解质相间层来提高阳极电解质兼容性和电池寿命.
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:
- 金属电池 (LMB) 对于高能量密度存储至关重要.
- 聚合物电解质 (PE) 与液体电解质相比,具有安全优势,但与稳定的接口作斗争.
- 实现稳定的电解质-电极接口仍然是高性能LMB的一个关键挑战.
研究的目的:
- 设计和制备一种新的凝聚合物电解质 (GPE-SL),以提高金属电池的性能.
- 为了应对LMB中不稳定的电解质-电极接口的挑战.
- 为了提高阳极-电解质兼容性和电池寿命.
主要方法:
- 开发了一种凝聚合物电解质 (GPE-SL),使用深度解电解质 (DEE) 和类似分支的聚合物骨架.
- 使用DEE诱导的in situ离子和基聚合物用于GPE-SL合成.
- 在金属阳极上研究了富含LiBr的固体电解质介相 (SEI) 层的形成.
主要成果:
- GPE-SL促进了Li的流迁移路径,确保了出色的电化学性能.
- 在现场形成的聚合物矩阵创建了一个富含LiBr的SEI层,显著延长了LMB的寿命.
- 基GPE-SL基LiFePO4电池表现出了显著的循环稳定性,在1C时1200个循环后保持了84%的容量.
结论:
- 用DEE诱导的聚合法是开发高性能LMB的一个有前途的策略.
- 这种方法通过在位稳定的SEI层结构有效地提高了阳极-电解质兼容性.
- 开发的GPE-SL为更安全,更持久的金属电池提供了可行的解决方案.
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