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一种与底结合的共价有机聚合物,用于超高容量的半电池和对称的全电池离子电池

Shen Xu¹, Chenchen Wang², Tianyi Song²

¹Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, 999077, P. R. China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|September 26, 2023

概括

用于离子电池 (SIB) 的高性能有机电极材料是使用共价有机聚合物 (COP) 开发的. 这种新型材料具有超高容量和出色的循环稳定性,推进了SIB技术.

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:

离子电池 (SIB) 是离子电池 (LIB) 的一个有希望的替代品,因为资源有限和安全问题.
由于缺乏高性能电极材料,SIBs的商业化受到阻碍.
有机电极材料具有诸如结构灵活性,低成本和环保等优点.

研究的目的:

为高性能SIB设计和合成一种基于共价有机聚合物 (COP) 的新材料.
为了整合多个氧化还原基因,提高导电性,并确保在有机电极材料中不溶性.
在SIB中评估开发材料的电化学性能.

主要方法:

合成一种共价有机聚合物 (COP),其中包含诺基和乙烯氧化还原中心.
加入硫来提高导电性和一个刚性骨架来提高不溶性.
半细胞和全细胞SIB的制造和电化学测试.

主要成果:

合成的COP材料 (CityU-9) 在半电池SIB中实现了1009 mAh g-1的超高特异容量.
该材料表现出极好的循环稳定性,在650个循环后,容量可以忽略不计.
第一个全COP对称的全电池显示了90mAhg-1的高特异容量和优越的速率能力.

结论:

开发的COP材料代表了SIBs有机电极材料的重大进步.
该研究通过扩大氧化还原活性部分的选择,为高性能新型有机电极材料提供了合理的设计策略.
这项研究为SIB在储能方面的更广泛应用铺平了道路.

关键词:

离子电池离子电池离子储存机制离子储存机制共价有机聚合物共价有机聚合物这就是他们的联系.有机电极是有机电极.有对称的全细胞.

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