在N,P-编码的碳巨孔纤维中,原子分散的性位点使高效的金属阳极成为可能
Yinxiang Zeng1, Zhihao Pei1, Deyan Luan1
1School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
Journal of the American Chemical Society
|May 26, 2023
概括
这项研究引入了一种新的3D宿主材料 (Cu/Zn-N/P-CMFs),用于防止金属阳极 (ZMA) 中的树脂生长. 这一创新使得电池中的深循环ZMA具有稳定,持久的性能.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 金属阳极 (ZMA) 对于高能量密度电池至关重要,但受到状物生长和寄生反应的影响,限制了它们的实际应用.
- 开发稳定和高效的主体对于克服深循环ZMA的这些局限性至关重要.
研究的目的:
- 设计和制造一种新的三维 (3D) 主体材料,用于高效的金属阳极.
- 研究原子分散的Cu和Zn位点对N,P编码的碳巨孔纤维 (Cu/Zn-N/P-CMF) 的作用,以抑制树突和寄生虫反应.
主要方法:
- 作为3D主体的N,P-编码碳巨孔纤维 (N/P-CMF) 的合成.
- 将原子分散的Cu和Zn位点在N/P-CMF上,以创建Cu/Zn-N/P-CMF的主体.
- 基于Cu/Zn-N/P-CMF的阳极的电化学表征,包括涂层/剥离试验和使用MnO2阴极进行全细胞组装.
主要成果:
- Cu/Zn-N/P-CMFs的3D宏孔结构有效地使Zn2+流同化,抑制树突的生长和结构应力.
- 原子分散的Cu和Zn站点作为丰富的核化站点,促进具有低过量的均Zn沉积.
- Cu/Zn-N/P-CMFs-Zn电极在2 mA cm-2和2 mAh cm-2低极化下显示了无树脂沉积和稳定的循环运行630小时.
- 使用Cu/Zn-N/P-CMFs-Zn阳极和MnO2阴极制造的全电池在恶劣条件下表现出令人印象深刻的循环性能.
结论:
- /Zn-N/P-CMFs主机为稳定深循环金属阳极提供了多功能和有效的解决方案.
- 这种方法通过减轻树突形成和寄生虫反应,显著提高了ZMA的可逆性和循环寿命.
- 这种材料有望提高下一代可充电电池的性能和可靠性.
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