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基离子凝电解质的制备和表征及其在固态电池中的应用
Ji-Cong Huang1,2, Yui Whei Chen-Yang2, Jiunn-Jer Hwang3,4
1Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
Polymers
|September 9, 2023
概括
这项研究合成了使用四乙烯正酸盐 (TEOS) 和甲基三西酸盐 (MTES) 的强的离子电解质,以提高机械强度. 由此产生的材料具有高离子导电性和电化学稳定性,适用于先进的电池应用.
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:
- 基于离子液体的电解质为更安全,更高效的储能设备提供了潜力.
- 开发具有高离子导电性和机械稳定的固态电解质仍然是一个关键的挑战.
- 离子体为创建先进的电解质材料提供了一个有希望的平台.
研究的目的:
- 使用TEOS和MTES前体合成新型的离子凝电解质.
- 研究已制备的离子凝的结构,机械和电化学特性.
- 为了评估离子电池应用中离子凝电解质的性能.
主要方法:
- 使用四甲基酸盐 (TEOS) 和甲基三基酸盐 (MTES) 与离子液体 ([BMIM-ClO4]) 和甲酸盐的sol-gel合成.
- 使用FT-IR,NMR (包括29Si MAS NMR) 和DSC进行表征.
- 电化学评估包括线性扫描电压测量 (LSV),电化学阻抗光谱 (EIS) 和电荷-放电循环.
主要成果:
- 加入甲基三氧化 (MTES) 提高了机械强度,并简化了离子体电解质的制备.
- 合成的离子凝电解质实现了1.65 × 10^-3 S/cm的高离子导电性.
- 证明了出色的电化学稳定性,承受超过5V的电压,在0.2°C和55°C时的第二循环容量为108.7mAh/g.
结论:
- 开发的离子凝电解质对下一代离子电池具有有前途的性能.
- TEOS,MTES和离子液体的组合为电解质设计提供了一个可调的方法.
- 增强的机械完整性和电化学性能凸显了这些材料在储能方面的潜力.
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