具有内在微孔性的聚合物作为固态电池的固态离子导体
Xiao-Xue Wang1,2, Li-Na Song1, Li-Jun Zheng1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 130012, Changchun, P. R. China.
Angewandte Chemie (International ed. in English)
|July 21, 2023
概括
内在微孔性的工程聚合物 (PIMs) 创造了高性能固态电解质 (SSEs),用于更安全,更稳定的电池. 这些基于PIM的SSE显示出出色的离子导电性和机械强度,防止了树突的生长,并使长期循环.
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:
- 固态电解质 (SSEs) 对于安全的固态电池至关重要.
- 目前的SSE通常不足以实现实际应用所需的导电性和稳定性.
研究的目的:
- 制定高性能SSE使用内在微孔性聚合物 (PIMs) 的总体战略.
- 为了提高SSEs的离子导电性,机械强度和电化学稳定性,用于先进的电池.
主要方法:
- 本质微性的工程聚合物 (PIMs) 来创建相互连接的离子通路.
- 将可电离组纳入PIM结构以促进离子运输.
- 制造基于PIM的SSE用于金属和氧电池的测试.
主要成果:
- 在基于PIM的SSE中,在25°C时达到1.06×10−3 S/cm的高离子导电性.
- 已证明具有机械强度 (50.0 MPa) 和非易燃性SSEs,具有出色的电化学稳定性.
- 基于PIM的SSEs成功地抑制了状体的生长和短路在Li对称电池中超过2200小时.
- 基于PIM的SSE使固态Li-O2电池具有高特异性 (11307 mAh/g) 和稳定的循环 (247个循环).
- 基于PIM的SSE在滥用测试 (曲,切割,透) 中表现强.
结论:
- 基于PIM的SSE为开发安全,高能固态电池提供了强大的战略.
- 设计的PIM结构为克服当前SSEs的局限性提供了一条途径.
- 这种方法显著提高了实用的固态电池技术的潜力.
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