可控制的交叉连接使固态金属电池的高离子导电性聚合物电解质成为可能
Mingcan Lin1, Fupeng Li1, Minjie Hou1,2
1National Engineering Research Center of Vacuum Metallurgy Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, China.
本研究引入了对固态聚合物电解质 (SPEs) 的可控光交联,增强了离子导电性. 优化的SPEs显著提高了固态金属电池 (SSMB) 的性能.
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:
- 紫外线 (UV) 光交联对于固态聚合物电解质 (SPEs) 是有效的,但通常会增加晶度,阻碍离子导电性.
- 控制聚合物网络结构对于开发高性能SPE至关重要.
研究的目的:
- 使用可控制的光交联策略开发具有高离子导电性的SPEs.
- 调查SPE中结晶性和交联密度的协同调节.
主要方法:
- 将乙烯基乙烯碳酸盐 (VEC) 纳入聚乙烯甘二烯酸盐 (PEGDA) 中,以控制交叉链接.
- 优化 SPEs 的制造和表征 (P1.5V1.5NB).
- 在金属电池配置中的SPE的电化学测试.
主要成果:
- 优化的P1.5V1.5NB电解质实现了高离子导电性 (1.39 × 10^-3 S cm^-1在30°C) 和广泛的电化学稳定性窗口 (4.8V).
- 一个Na‖P1.5V1.5NB‖Na3V2(PO4)3 (NVP) 电池表现出色,在2°C下提供92.62 mAh g^-1,在1000个循环后保持89.26%的容量.
结论:
- 可控制的照片交叉连接为制造高性能SPE提供了一种新的策略.
- 开发的SPEs显著提高了固态金属电池 (SSMB) 的电化学性能.
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