一种来自sol-gel的LaCoO矿作为Al-air电池的电催化剂
Suruthi Vasudevan1, Swathi Tharani D1, Minakshi Manickam2
1Electrochemical Sensors and Energy Materials Lab, PSG Institute of Advanced Studies, Coimbatore, Tamil Nadu 641004, India.
Dalton transactions (Cambridge, England : 2003)
|February 1, 2024
概括
兰氧化物 (LaCoO3) 矿在空气电池中作为阴极催化剂表现出色. 这种材料表现出高效的氧气减排和稳定的电池运行,表明其对高性能储能应用的潜力.
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:
- 空气电池具有高的理论能量密度,但需要高效的阴极催化剂.
- 矿氧化物因其可调节性质而被探索为有前途的电催化剂.
研究的目的:
- 调查LaCoO矿氧化物作为Al-空气电池的阴极催化剂的性能.
- 描述合成的LaCoO3的结构,形态和电化学特性.
主要方法:
- 对于LaCoO3制剂的Sol-gel合成.
- 进行X射线衍射 (XRD),扫描电子显微镜 (SEM),传输电子显微镜 (TEM) 和布鲁努埃尔-埃米特-泰勒 (BET) 分析以进行材料表征.
- 电化学研究包括循环电压测量,时测量和阻抗光谱学.
- 使用LaCoO3阴极和基于PVA的KOH凝电解质的Al-空气电池的制造和测试.
主要成果:
- LaCoO3表现出单临床对称性,聚合多孔形态,平均粒子大小为49.94nm.
- 电化学测试显示通过4电子通路增强氧降解反应 (ORR) 活性,质量和特异性活性为3.05mA mg-1和0.33mA cm-2在1.2V与RHE.
- 在0.6V与RHE相比,Al-air电池实现了1.35V的开放电路电压 (OCV),1770mA hg-1的放电容量,以及10.04mW cm-2的功率密度,证明了良好的稳定性.
结论:
- LaCoO是Al-空气电池的高效阴极催化剂,具有卓越的电化学性能和稳定性.
- 合成的LaCoO3矿显示出开发高性能和持久的空气储能系统的巨大潜力.
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