聚合物固态离子电池的复合离子凝电极
Noah B Schorr1, Austin Bhandarkar2, Josefine D McBrayer1
1Department of Power Sources R&D, Sandia National Laboratories, Albuquerque, NM 87123, USA.
Polymers
|July 13, 2024
概括
研究人员开发了来自离子凝的固态电解质,用于高性能离子电池. 这种可扩展的方法可以在复合电极中实现高活性材料负载,以提高能量密度和稳定的循环.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 在可充电电池中实现高能量和功率密度对于电动汽车和便携式电子设备等应用至关重要.
- 固态电池比传统的离子电池具有潜在的安全优势,但电极设计仍然是一个重大挑战.
- 电极中的高活性物质负载对于实际的能量密度至关重要,但在固态系统中难以实现.
研究的目的:
- 为固态离子电池制造具有高活性物质负载的复合电极开发一种新的战略.
- 研究来自离子凝的固态电解质在实现可扩展制造高性能电池方面的性能.
- 展示这些复合电极和电解质在实现高容量利用和稳定的循环中的潜力.
主要方法:
- 利用来自离子凝的固态电解质 (SSEs) 来制造复合电极.
- 在复合酸电极中的调前体和活性物质组成.
- 制造和测试的全聚合物固态电池,包括复合阳极和铁酸盐阴极与离子凝SSEs.
主要成果:
- 使用可扩展的方法实现了高活性物质负载 (>10 mg/cm2,~9 mA/cm2在1C).
- 在复合酸电极中,在C/5速率下显示了近乎理论的容量利用率.
- 在室温下达到5.85mA/cm2 (11.70A/g) 的稳定循环,平均库伦比效率超过99%.
- 展示了一个完整的固态电池,在1C速率下稳定循环.
结论:
- 来自离子凝的SSE为高性能固态离子电池的可扩展制造提供了可行的途径.
- 开发的复合电极策略有效地解决了高活性材料负载的挑战.
- 这些进步为更安全,更高能量密度的固态电池铺平了道路.
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