Zn 和 Cl 相关调节的 MXene 催化剂增强了 Li-CO2电池可逆性
Xue Tian1, Huan Liu2, Bin Cao2
1State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.
ACS nano
|December 18, 2024
概括
这项研究使用修改的MXene催化剂 (Zn-Ti3C2Cl2) 增强-CO2电池. 新的催化剂改善了碳酸的分解,导致超低超电位和稳定循环1500小时.
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:
- 由于导电性和CO2激活,MXenes作为Li-CO2电池的阴极具有前景.
- 对于MXene对Li-CO2电池生命周期的吸附和电子结构影响的了解有限.
研究的目的:
- 研究和提高碳酸在Li-CO2电池中的吸附分解过程.
- 为了提高Li-CO2电池的可逆性和循环稳定性.
主要方法:
- 使用一种同调节方法,将Ti3C2 MXene与Zn和Cl表面组进行修改,生成Zn-Ti3C2Cl2.2.
- 研究了表面组修改对碳酸吸附和分解的影响.
- 评估了二氧化碳电池中修改的MXene催化剂的电化学性能,包括超电位和循环稳定性.
主要成果:
- Zn-Ti3C2Cl2 由于 Cl 表面群形成了增强的 Li2CO3 吸附,形成了小的,均的 Li2CO3 颗粒.
- 的引入转移了Ti d频段中心,促进了CO2演化反应 (CO2ER) 和排放产品分解.
- Zn-Ti3C2Cl2催化剂在200 mA g-1下达到0.72 V的超低超电位,并稳定循环1500小时.
结论:
- 用 Zn 和 Cl 表面组修改 MXene 有效地提高了 Li-CO2 电池的性能.
- 调整吸附分解过程对于促进Li-CO2电池的可逆性至关重要.
- 开发的Zn-Ti3C2Cl2催化剂代表了-CO2电池技术的重大进步.
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