双电极功能共价有机聚合物,由容量电压相关描述器设计,用于高级和防/储存
Tianjiang Sun1, Weijia Zhang2, Mengyao Shi2
1School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, P. R. China.
ACS nano
|March 13, 2026
概括
一个新的描述符,活性与无活性原子比 (A/I),使得高容量有机电极材料 (OEM) 的设计成为可能. 新型聚合物TAPT-COP在离子和离子电池中表现出色,因为其A/I比高.
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
- 聚合物化学 聚合物化学
背景情况:
- 有机电极材料 (OEM) 提供结构灵活性,但具有低容量和有限的功能.
- 现有的OEM厂商往往难以平衡高能量密度与多功能应用.
- 需要新的设计原则来提高OEM在储能方面的性能.
研究的目的:
- 引入一种与容量电压相关的描述符,即活性与无活性原子比 (A/I),用于设计先进的OEM.
- 合成和描述一种共价有机聚合物 (TAPT-COP),作为高性能电极的概念验证.
- 评估TAPT-COP在离子和离子电池中的潜力.
主要方法:
- 基于高A/I比率 (0.61) 的TAPT-COP的设计,利用丰富的活性组 (CO,CN).
- 在离子电池 (LIB) 和离子电池 (SIB) 中对TAPT-COP作为阴极和阳极的电化学评估.
- 现场光谱分析 (拉曼,FTIR) 和密度函数理论 (DFT) 计算以阐明存储机制.
主要成果:
- TAPT-COP具有较高的Li+/Na+存储容量:353.5 mAh g-1 (阴极) 和383.0 mAh g-1 (阳极) 的LIBs;329.6 mAh g-1 (阴极) 和352.0 mAh g-1 (阳极) 的SIBs.
- 该材料表现出优异的速率能力和卓越的防性能.
- 谱学和理论研究证实,CO和CN组作为每台TAPT-COP单位高达60个Li+离子的协调站点,驱动高容量.
结论:
- A/I比率是设计高容量和多功能OEM的有效描述符.
- 由于其丰富的活跃站点,TAPT-COP显示出作为LIB和SIB的阴极和阳极材料的显著性能.
- 当作为分离的电极使用时,TAPT-COP表现出增强的稳定性,突出显示了它对下一代能源存储的承诺.
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