聚合物金属有机纳米囊网络的分子设计,用于固态电池
Xin-Yue Ma1, Xiao-Xue Wang1, De-Hui Guan1
1Jilin University, College of Chemistry, 2699, Qianjin Street, 130012, 130021, Changchun, CHINA.
Angewandte Chemie (International ed. in English)
|May 16, 2025
概括
研究人员开发了一种新的聚合物金属有机纳米囊网络,用于更安全,高性能固态电池. 这种材料增强了离子导电性和稳定性,防止了树的生长,从而延长了电池的寿命.
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
- 纳米技术 纳米技术
背景情况:
- 固态电解质 (SSEs) 对于安全的 (Li) 电池运行至关重要.
- 目前的SSEs努力平衡离子导电性和稳定性,阻碍实际应用.
- 开发先进的SSE是克服电池局限性的关键.
研究的目的:
- 通过分子设计方法提出高性能SSE的总体战略.
- 创建一个Li+导电的聚合物金属有机纳米囊 (PolyMONC(Li)) 网络.
- 为了证明这种新材料在固态电池中的潜力.
主要方法:
- 金属有机纳米囊 (MONCs) 的分子设计用于离子封闭.
- 构建一个具有连续Li+传导路径的PolyMONC ((Li) 网络.
- 使用开发的SSE,制造和测试对称电池和金属电池.
主要成果:
- 该PolyMONC ((Li) 网络表现出高的离子导电率 (0.18 mS cm−1 在25 °C) 和高的Li+转移数 (0.83).
- SSE有效地抑制了树的生长,并防止了对称电池中短路超过900小时.
- 在金属电池中,基于PolyMONC的SSE显示出比基于氧化聚乙烯的SSE更高的特异性容量.
- 该PolyMONC(Li) 还作为电极结合剂,使固态Li-O2电池能够在400个周期内稳定循环.
结论:
- 开发的PolyMONC ((Li) 网络为先进的SSEs提供了机械强度和Li+导电性的最佳平衡.
- 这一战略为开发高性能,安全的固态电池提供了可行的途径.
- 这项工作提供了一个全面的指导方针,从分子设计到多孔固体的实际应用.
相关概念视频
02:37Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
02:18Network Covalent Solids
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...