嵌入式复合电解质,具有优良的接口接触,用于高性能固态离子电池
Wenting Wang1, Wenyong Yuan1, Zhongjun Zhao2
1School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, PR China.
Journal of colloid and interface science
|August 17, 2023
概括
这项研究开发了一种用于离子电池的新型固态电解质,通过与Ce4+和F-. 由此产生的复合电解质显示出增强的离子导电性和改进的接口接触,为更安全,更有效的储能解决方案铺平了道路.
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
- 固态化学 固态化学
背景情况:
- 固态离子电池 (SSIB) 提供高安全性和能量密度,但具有低离子导电性和差的接口接触.
- 开发先进的固态电解质 (SSEs) 对于克服这些局限性和实现实用的SIB应用至关重要.
研究的目的:
- 设计和合成一种基于PVDF-HFP和Ce4+/F的新型复合SSE-配合合Na3Zr2Si2PO12 (NZC0.05SPF0.7).
- 研究Ce4+和F-兴奋剂对SSE结构和电化学特性的影响.
- 为了评估复合SSE在固态离子电池中的性能.
主要方法:
- 与Ce4+和F-一起对Na3Zr2Si2PO12进行共,以产生NZC0.05SPF0.7.7.
- 使用PVDF-HFP膜制造一个三明治复合SSE (G-NZC0.05SPF0.7-G).
- 结晶结构,密度和离子导电性的表征.
- 电化学测试,包括离子导电量测量,电化学稳定性窗口,临界电流密度和完整电池的循环性能.
主要成果:
- 最佳的NZC0.05SPF0.7表现出高的离子导电性 (1.39 × 10^-3 S cm^-1在25°C).
- PVDF-HFP膜增强了电解质和电极之间的界面兼容性.
- G-NZC0.05SPF0.7-G SSE表现出了出色的性能:在25°C时的离子导电率为1.07 × 10^-3 S cm^-1,电化学稳定性窗口宽 (4.5 V),高临界电流密度 (1.2 A cm^-2),并且在600小时内稳定的Na/剥离.
- 组装后的SIB表现出了显著的循环稳定性和速度能力.
结论:
- Ce4+/F-共是提高Na3Zr2Si2PO12的离子导电性的有效策略.
- 这种PVDF-HFP/NZC0.05SPF0.7/PVDF-HFP复合SSE对固态离子电池具有优越的性能.
- 这项工作为开发高性能和安全的储能设备的先进SSE提供了有希望的方法.
关键词:
Ce(4+) /F(−) 联合兴奋剂使用.离子导电性 离子导电性() () () () () () () () () () () () () () () () ) () () () () () ) () () () ) () () () () () () () () ) () () ) () ) () ) () () ) () () () () ) () () () () () () () () () () () () ()固态离子电池 固态离子电池稳定无接口 稳定无接口更多相关视频
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