坚固和粘合性层状固体电解质,具有均质和快速的离子导电,用于高性能全固态金属电池
Shiyuan Guo1,2, Yuefeng Su1,2, Kang Yan2
1School of Materials Science and Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 14, 2024
概括
研究人员开发了一种全固态金属电池 (ASSLMB) 的新型层状固体电解质 (LSE-HFC). 这种复合体固体电解质增强了离子导电性和机械性能,使电池性能稳定.
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:
- 复合固体电解质 (CSEs) 对于高性能全固态金属电池 (ASSLMB) 是至关重要的.
- 在CSE开发中的一个关键挑战是平衡机械强度与电极粘附,以实现稳定的离子流量.
- 现有的CSE往往难以克服模块和粘附之间的权衡.
研究的目的:
- 提出一种新的策略,用于构建层状固体电解质 (LSE-HFC),它将机械强度与高效的离子导电相结合.
- 通过将离子导体插入一个强大的协调层状框架来解决当前CSE的局限性.
- 证明这种方法在提高ASSLMB的业绩方面的有效性.
主要方法:
- 制造一个9微米厚的层状固体电解质,用金属有机框架纳米板作为构件.
- 在协调层状框架中插入聚乙烯氧化物/苏奇尼尼特,以创建LSE-HFC.
- 离子转移机制,离子导电性和离子转移数的表征.
- 评估LiFePO4/Li和LiNi0.6Mn0.2Co0.2O2/Li电池的机械性能 (抗穿孔,粘附) 和电化学性能.
主要成果:
- 在LSE-HFC展现同质和快速的离子导电与低迁移能量障碍.
- 在25°C达到5.62 × 10−4 S cm−1的高离子导电性和0.78的离子转移数.
- 证明了出色的机械强度和对电极的增强附着性,导致均的涂/脱落.
- 该LSE-HFC使得高能量密度的ASSLMB具有出色的循环稳定性.
结论:
- 开发的LSE-HFC战略有效地克服了CSE的机械模块和粘附之间的权衡.
- 这种方法促进了均的离子流量,并提高了ASSLMB的整体性能.
- 对于下一代高性能和安全的固态电池的开发,LSE-HFC显示出显著的前景.
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