来自多价值聚合物联体的高性聚合物电解质,用于加快Li运输的固态金属电池
Fangmin Ye1, Zhixin Wang1, Mengcheng Li1
1Key Laboratory of Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China.
Nano letters
|May 9, 2024
概括
一种新的高固态聚合物电解质 (SSPE) 使用多变量聚合物联体被开发出来. 这种新材料增强了固态金属电池的离子导电性和界面稳定性.
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
- 聚合物科学 聚合物科学
背景情况:
- 基于固态聚合物的电解质 (SSPE) 对高能量密度的固态金属电池 (SSLMB) 是有前途的.
- 目前的SSPE面临着挑战,包括低离子导电性和由于聚合物结晶性和缓慢的离子传输,与金属的界面兼容性差.
研究的目的:
- 提出使用多变量聚合物联体构建高性SSPE的新策略.
- 开发一种新的SSPE材料,以提高SSLMB的性能.
主要方法:
- 通过类似点击的反应将聚乙烯化物-co-hexafluoropropylene (PH) 链植入聚乙烯胺 (PEI) 上,形成HE-PEIgPHE.
- 描述HE-PEIgPHE材料的特性,并评估其在对称电池和LiFePO4电池配置中的性能.
主要成果:
- 与PH (5.18 MPa) 相比,开发的HE-PEIgPHE具有更高的模量 (6.75 MPa).
- HE-PEIgPHE显示显著增强的离子导电性 (2.14 × 10−4 S cm−1) 和Li+转移数 (0.55) 与PH (1.03 × 10−4 S cm−1 和0.42,分别).
- 一个Liidiye-PEIgPHE的LiFePO4电池实现了1500小时的长周期寿命,一个Liidiye-PEIgPHE的LiFePO4电池提供了高初始容量 (160 mAh g-1),具有优异的容量保留 (98.7%).
结论:
- 拟议的高性SSPE战略为传统方法 (如共聚合) 提供了一个有希望的替代方案.
- 该HE-PEIgPHE材料显示出促进高性能固态金属电池开发的巨大潜力.
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