空间封闭的工程向金属有机框架中的深度环氧电解质,使固态离子电池成为可能
Cheng-Lin Miao1,2, Xiao-Xue Wang1,2, De-Hui Guan1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Angewandte Chemie (International ed. in English)
|July 11, 2024
概括
研究人员开发了一种新型的固态电解质,通过将一个深层欧特克电解质限制在一个金属有机框架 (MOF) 中. 这一进步通过改善离子运输和抑制副作用反应来提高离子电池 (ZIB) 的性能和安全性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 离子电池 (ZIB) 中的水性电解质会受到诸如进化和树生长等副作用的影响,这阻碍了实际应用.
- 固态电解质 (SSEs) 提供了一个有前途的策略来克服ZIB中的这些局限性.
研究的目的:
- 设计和合成一种新的固态电解质 (SSE),用于高性能和安全的ZIB.
- 调查新的SSE的离子传输特性和电化学稳定性.
主要方法:
- 在金属有机框架 (MOF),特别是PCN-222的纳米通道中限制一个深度解电解质 (DEE),以创建一个DEE@PCN-222 SSE.
- 描述DEE@PCN-222 SSE.的离子导电性,激活能量和离子转移数.
- 通过实验和理论调查,使用开发的SSE评估涂/剥离行为和固态ZIB的性能.
主要成果:
- 该DEE@PCN-222 SSE表现出高的离子导电性 (3.13×10−4 S cm−1),低的激活能 (0.12 eV),以及高的Zn2+转移数 (0.74).
- DEE@PCN-222的独特结构有效调节了Zn2+的分布,并抑制了界面的副作用反应.
- SSE能够在2476小时内进行高度可逆的Zn/剥离,并促进固态ZIB,其特定容量为306 mAh g-1和517个周期.
结论:
- DEE@PCN-222 SSE 显示出优异的离子传输特性和电化学稳定性,解决了 ZIB 中的主要挑战.
- 这种新的SSE设计为开发高安全性和高性能离子电池提供了新的途径.
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