阿尔基尼尔增强了高性能储存和机制,在共价类类框架中
Yingnan Cao1, Haoyan Fang1, Chaofei Guo1
1Department of Chemical Engineering, School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.
Angewandte Chemie (International ed. in English)
|June 3, 2023
概括
研究人员开发了一种新型的基结合共价类类框架 (Alkynyl-CPF),以提高离子电池的性能. 这种材料表现出提高的导电性和卓越的循环稳定性,用于先进的储能应用.
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
- 有机化学 有机化学
背景情况:
- 导电性差,阻碍了共价有机材料在储能中的应用.
- 在共价有机材料中基键的储存机制尚未得到充分探索.
研究的目的:
- 为提高离子电池性能合成一种新型的基结对应型类类框架 (Alkynyl-CPF).
- 研究合成材料的电荷传输机制和能量储存行为.
主要方法:
- 纳米大小 (≈80 nm) 基尼尔-CPF的合成.
- 密度函数理论 (DFT) 计算以确定HOMO-LUMO能量差距和导电性.
- 电化学测试 (循环性能,速度能力).
- 材料表征 (拉曼,FT-IR,XPS,EIS) 和理论模拟.
主要成果:
- 基尼尔-CPF由于高电子联和低HOMO-LUMO能量差距 (2.629 eV) 而表现出增强的内在电荷导电性.
- 阿尔基尼尔-CPF电极表现出卓越的循环性能 (1068.0 mAh g-1在300个循环后在100 mA g-1上) 和速率能力 (410.5 mAh g-1在700个循环后在1000 mA g-1上).
- 阐明了涉及CC单元和表林组的能量储存机制.
结论:
- 基尼尔-CPF为开发用于离子电池的高性能共价有机材料提供了一个有前途的战略.
- 该研究提供了对电化学能量存储的共价有机材料的设计原理和机制研究的见解.
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