通过高的合金催化剂提高Li-CO2电池性能:对配置效应的洞察
Zhang Wen1, Xiaowei Mu1,2, Xinyi Sun1
1Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China.
Angewandte Chemie (International ed. in English)
|February 8, 2025
概括
高合金 (HEAs) 通过改善阴极催化剂活性来提高二氧化 (Li-CO2) 电池性能. FeCoNiCuRu HEAs 的混合度增加与更好的容量和稳定性相关,证明了它们的实际潜力.
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:
- 二氧化碳 (Li-CO2) 电池具有很高的能量密度和CO2利用率.
- 二氧化碳电池的缓慢动力学需要先进的阴极催化剂.
- 高合金 (HEAs) 作为催化剂具有前景,但它们的结构-性质关系尚不清楚.
研究的目的:
- 调查混合 (ΔSmix) 与二氧化碳电池的高温电源中的催化性能之间的关系.
- 开发新的HEA阴极催化剂,以提高Li-CO2电池的效率和稳定性.
主要方法:
- 在碳纳米纤维上合成具有变化 ΔSmix 的化 FeCoNiCuRu 合金.
- 在Li-CO2电池系统中的HEA催化剂的电化学表征.
- 计算建模以了解 ΔSmix 与催化活性之间的相关性.
主要成果:
- 在FeCoNiCuRu HEAs中发现了 ΔSmix 和催化活性之间的正相关性.
- 具有最大 ΔSmix 的 HEA 显示出高容量 (6160 mAh g−1),低充电电位 (<4.0 V) 和出色的循环稳定性 (550 循环/5500 h).
- 用HEAs制造的袋式电池在低贵金属负载下证明了其实际适用性.
结论:
- 高工程是设计Li-CO2电池中先进电催化剂的可行策略.
- 研究的HEAs在-CO2应用中显著优于大多数报告的Ru基催化剂.
- 这项研究为优化HEA催化剂用于下一代能源存储提供了关键的见解.
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