结合有机框架升级 Li-CO 2 电池的循环稳定性和速率能力
Zhibin Cheng1,2, Yanlong Fang1, Yisi Yang1
1Fujian Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou, 350007, China.
Angewandte Chemie (International ed. in English)
|September 19, 2023
概括
一种新的结有机框架 (HOF) 作为二氧化碳 (Li-CO2) 电池中的联合催化剂. 这种HOF通过优化离子运输和催化站点来提高循环稳定性和速率能力.
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
- 纳米技术 纳米技术
背景情况:
- 先进的电催化剂对于提高二氧化碳 (Li-CO2) 电池的性能至关重要.
- 结合有机框架 (HOF) 为电池应用提供了有前途的特性,如开放通道和可功能化的表面.
研究的目的:
- 引入一种新的结有机框架 (HOF-FJU-1),作为Li-CO2电池阴极的联合催化剂.
- 研究HOF-FJU-1在提高Li-CO2电池稳定性和速度能力方面的作用.
主要方法:
- HOF-FJU-1.的合成和表征.
- 整合HOF-FJU-1作为Li-CO2电池的阴极材料中的联合催化剂.
- 在各种电流密度和循环条件下对Li-CO2电池进行电化学测试.
主要成果:
- HOF-FJU-1促进排放产品的均沉积,并适应它们的体积膨胀.
- HOF-FJU-1 能够与 Ru0 纳米颗粒进行有效的相互作用,为 CO2 减少反应 (CRR) 和 CO2 演化反应 (CER) 创建统一的催化位点.
- HOF-FJU-1促进了快速的Li+和CO2运输,从而提高了氧化还原动力学.
结论:
- 基于HOF-FJU-1的Li-CO2电池表现出了显著的循环稳定性 (在400 mA g-1下1800小时) 和出色的速率能力 (在5 A g-1下低超电位).
- 这项研究强调了基于HOF的多功能催化剂在提高Li-CO2电池性能方面的潜力.
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