基于La的矿用于提高Li-O电池的容量2
Bing-Ze Hsu1, Jun-Kai Lai1, Yi-Hsuan Lee1
1Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan.
Frontiers in chemistry
|September 18, 2023
概括
氧电池显示出储能方面的巨大潜力. 研究人员发现La0.5Sr0.5CoO3-δ/Super P是一种高效的阴极催化剂,显著提高了电池性能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氧 (Li-O2) 电池具有较高的理论能量密度,但实际容量较低.
- 矿被探索为Li-O2电池中的空气电极反应的催化剂,但它们对催化活性的结构和兴奋剂效应需要进一步澄清.
研究的目的:
- 研究结构和兴奋剂对矿材料在Li-O2电池中的催化活性的影响.
- 为了确定最佳的矿组成,以提高空气电极性能.
主要方法:
- 对La1-xSrxCoO3-δ (x = 0.1, 0.3, 0.5) 和La0.9Sr0.1YbO3-δ矿石的合成和表征.
- 通过混合矿与碳黑 (Vulcan XC500或Super P) 来制备空气电极.
- 使用Swagelok型电池进行电化学评估,包括电荷-放电容量和循环电压计 (CV) 分析.
主要成果:
- La1-xSrxCoO3-δ (x = 0.1, 0.3, 0.5) 证明了其适用性作为Li-O2电池的阴极催化剂.
- 该La0.5Sr0.5CoO3-δ/超级P阴极实现了6,032 mAhg-1.1的最高放电容量.
- 优越的性能与更大的反应面积和增加的碳酸 (Li2CO3) 生产有关.
结论:
- 化矿,特别是La1-xSrxCoO3-δ,是提高Li-O2电池性能的有效催化剂.
- 这种La0.5Sr0.5CoO3-δ/Super P组合显示出对先进的储能应用有很大的前景.
- 优化矿结构和兴奋剂增强了-O2电池的催化活性和放电能力.
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