精确构建轨道合的Fe─Co双原子站点,用于高能效的Zn-空气/化物混合电池
Jingyuan Qiao1, Yurong You1, Lingqiao Kong1
1School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|May 30, 2024
概括
开发先进的可充电空气电池 (ZAB) 对储能至关重要. 这项研究引入了新的Fe-Co二原子位点催化剂 (FeCo-DACs) 和-空气/化混合电池 (ZAIHBs),以显著提高能源效率和稳定性.
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:
- 可充电的空气电池 (ZAB) 提供了大量的储能潜力,但面临着充电电压高和低能效的挑战.
- 这些性能缺陷限制了ZAB的商业化.
研究的目的:
- 通过开发新型催化剂和混合动力电池架构来提高ZAB的性能.
- 解决高充电电压和ZAB中低能效的局限性.
主要方法:
- 精确构建的多功能Fe-Co二原子位点催化剂 (FeCo-DACs) 被合成.
- /酸氧化还原被整合到ZAB中,以创建-空气/酸混合电池 (ZAIHB).
- 研究了FeCo-DACs的电子结构和催化性能.
主要成果:
- FeCo-DACs在Fe和Co3d轨道之间表现出强烈的合,优化了氧反应和化/酸氧化还原的催化活性.
- 催化剂表现出优异的双功能氧催化活性,具有较小的电位间隙 (0.66V) 和卓越的稳定性.
- 基于FeCo-DAC的ZAIHBs实现了高能效 (75%在10 mA cm−2) 和出色的循环稳定性 (72%在500小时后).
结论:
- 开发的FeCo-DAC和ZAIHB架构显著提高了可充电电池的能效和稳定性.
- 这项研究为设计高性能能量存储设备的二原子位点催化剂提供了洞察力.
- 这些发现为开发下一代高能效储能解决方案铺平了道路.
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